diff --git a/docs/migration/css-changes-in-version-4.md b/docs/migration/css-changes-in-version-4.md
index d7bace9d28a..68e07a4a870 100644
--- a/docs/migration/css-changes-in-version-4.md
+++ b/docs/migration/css-changes-in-version-4.md
@@ -4,88 +4,113 @@ title: Changes to Styles in 4.0
 
 ## Changes in Checkout Components
 
-* `cx-product-variants` selector has been moved to corresponding feature-lib `@spartacus/product`.
+- `cx-product-variants` selector has been moved to corresponding feature-lib `@spartacus/product`.
 
 ## Change in Configurator Attribute Type Components
 
-* `cx-quantity` selector has been added to achieve a consistent styling.
+- `cx-quantity` selector has been added to achieve a consistent styling.
 
 ## Changes in Configurator Product Title Component
 
-* `width` set to 80% on `%cx-configurator-product-title` to use only 80% of the configuration product title width.
+- `width` set to 80% on `%cx-configurator-product-title` to use only 80% of the configuration product title width.
 
-* `button` instead of the anchor link on `%cx-configurator-product-title`.
+- `button` instead of the anchor link on `%cx-configurator-product-title`.
 
-* `padding` set to 16px/ 32px on `%cx-configurator-product-title` for `cx-details` selector to align spacing depending on the screen size.
+- `padding` set to 16px/ 32px on `%cx-configurator-product-title` for `cx-details` selector to align spacing depending on the screen size.
 
-* `cx-configurator-image` mixin has been defined on `%cx-configurator-product-title` for `cx-details-image` selector to achieve a consistent styling.
+- `cx-configurator-image` mixin has been defined on `%cx-configurator-product-title` for `cx-details-image` selector to achieve a consistent styling.
 
-* `cx-configurator-truncate-content` mixin has been added on `%cx-configurator-product-title` for `cx-detail-title`, `cx-code` and `cx-description` selectors to enable the truncation for the small widgets.
+- `cx-configurator-truncate-content` mixin has been added on `%cx-configurator-product-title` for `cx-detail-title`, `cx-code` and `cx-description` selectors to enable the truncation for the small widgets.
 
 ## Changes in Configurator Group Menu Component
 
-* `cx-group-menu` class replace `ul` element on `%cx-configurator-group-menu`.
-  
-* `cx-configurator-truncate-content` mixin has been added on `%cx-configurator-group-menu` for `span` selector to enable the configuration group title truncation for the small widgets.
+- `cx-group-menu` class replaces `ul` element on `%cx-configurator-group-menu`.
+- `cx-configurator-truncate-content` mixin has been added on `%cx-configurator-group-menu` for `span` selector to enable the configuration group title truncation for the small widgets.
 
 ## Changes in Configurator Form Component
 
-* `width` set to 100% on `%cx-configurator-form` to use the whole width of the configuration form.
+- `width` set to 100% on `%cx-configurator-form` to use the whole width of the configuration form.
 
-* `padding` set to 16px on `%cx-configurator-form` for `cx-group-attribute` to align the spacing between the configuration group attributes.
+- `padding` set to 16px on `%cx-configurator-form` for `cx-group-attribute` to align the spacing between the configuration group attributes.
 
 ## Changes in Configurator Attribute Header Component
 
-* `margin` set to 17px on `%cx-configurator-attribute-header` to align the spacing to the attribute header to the attribute type.
+- `margin` set to 17px on `%cx-configurator-attribute-header` to align the spacing to the attribute header to the attribute type.
 
-* `padding` set to 0px and `margin` to 17px on `%cx-configurator-attribute-type` to align the spacing between the configuration attribute types.
+- `padding` set to 0px and `margin` to 17px on `%cx-configurator-attribute-type` to align the spacing between the configuration attribute types.
 
 ## Change in Configurator Attribute Drop-Down Component
 
-* `padding` set to 1rem on `%cx-configurator-attribute-drop-down` for `cx-configurator-attribute-quantity` selector to define the spacing between the drop-down attribute type and the quantity counter.
+- `padding` set to 1rem on `%cx-configurator-attribute-drop-down` for `cx-configurator-attribute-quantity` selector to define the spacing between the drop-down attribute type and the quantity counter.
 
 ## Change in Configurator Attribute Checkbox List Component
 
-* `padding` set to 1rem on `%cx-configurator-attribute-checkbox-list` to define the spacing between the checkbox-list attribute type and the quantity counter.
+- `padding` set to 1rem on `%cx-configurator-attribute-checkbox-list` to define the spacing between the checkbox-list attribute type and the quantity counter.
 
 ## Change in Configurator Attribute Radio Button Component
 
-* `padding` set to 1rem on `%cx-configurator-attribute-radio-button` to define the spacing between the radio-button attribute type and the quantity counter.
+- `padding` set to 1rem on `%cx-configurator-attribute-radio-button` to define the spacing between the radio-button attribute type and the quantity counter.
 
 ## Change in Configurator Previous Next Button Component
 
-* `padding` set to 16px on `%cx-configurator-previous-next-buttons` to align the spacing between the configuration form and the bottom of the configuration.
+- `padding` set to 16px on `%cx-configurator-previous-next-buttons` to align the spacing between the configuration form and the bottom of the configuration.
 
 ## Change in Configurator Price Summary Component
 
-* `padding` set to 16px on `%cx-configurator-price-summary` for cx-total-summary selector to align the spacing.
+- `padding` set to 16px on `%cx-configurator-price-summary` for cx-total-summary selector to align the spacing.
 
 ## Change in Configurator Footer Container Mixin
 
-* `padding` set to 16px on `%cx-configurator-footer-container` mixin to align the spacing between the price summary and add-to-cart button.
+- `padding` set to 16px on `%cx-configurator-footer-container` mixin to align the spacing between the price summary and add-to-cart button.
 
 ## Change in Configurator Required Error Message Mixin
 
-* `padding` set to 5px on `%cx-configurator-required-error-msg` mixin to add the spacing at the end of the cx-icon selector.
+- `padding` set to 5px on `%cx-configurator-required-error-msg` mixin to add the spacing at the end of the cx-icon selector.
 
 ## Changes in Configurator Overview Form Component
 
-* `padding` set to 0px on `%cx-configurator-overview-form` to fix inconsistent spacings in the configuration overview form.
+- `padding` set to 0px on `%cx-configurator-overview-form` to fix inconsistent spacings in the configuration overview form.
 
-* `padding` set to 20px and `margin` to 0px on `%cx-configurator-overview-form` for `cx-group` selector to align spacing between the configuration overview groups.
+- `padding` set to 20px and `margin` to 0px on `%cx-configurator-overview-form` for `cx-group` selector to align spacing between the configuration overview groups.
 
-* `padding` set to 32px/16px on `%cx-configurator-overview-form` for `h2` selector to align spacing around the configuration overview group titles.
+- `padding` set to 32px/16px on `%cx-configurator-overview-form` for `h2` selector to align spacing around the configuration overview group titles.
 
-* `cx-configurator-truncate-content` mixin has been added on `%cx-configurator-overview-form` for `span` selector to enable the overview group title truncation for the small widgets.
+- `cx-configurator-truncate-content` mixin has been added on `%cx-configurator-overview-form` for `span` selector to enable the overview group title truncation for the small widgets.
 
-* `padding` set to 32px on `%cx-configurator-overview-form` for `cx-attribute-value-pair` selector to align spacing between the configuration overview attribute value pairs.
+- `padding` set to 32px on `%cx-configurator-overview-form` for `cx-attribute-value-pair` selector to align spacing between the configuration overview attribute value pairs.
 
-* `display` set to `none / inline` and `visibility` to `hidden` on `%cx-configurator-overview-form` for `cx-attribute-value-pair` selector to define the visibility for the configuration overview attribute value label.
+- `display` set to `none / inline` and `visibility` to `hidden` on `%cx-configurator-overview-form` for `cx-attribute-value-pair` selector to define the visibility for the configuration overview attribute value label.
 
-* `padding` set to 20px on `%cx-configurator-overview-form` for `cx-no-attribute-value-pairs` selector to align spacing between the configuration overview form and the container which is shown when there are no results including a link for removing filter(s).
+- `padding` set to 20px on `%cx-configurator-overview-form` for `cx-no-attribute-value-pairs` selector to align spacing between the configuration overview form and the container which is shown when there are no results including a link for removing filter(s).
+
+- `font-size` set to 1.25rem on `%cx-configurator-overview-form` for `topLevel` selector to adjust the attribute header according to the new styling requirement
+
+- `font-weight` set to 700 on `%cx-configurator-overview-form` for `topLevel` selector to adjust the attribute header according to the new styling requirement
+
+- `border-bottom` set to solid 1px var(--cx-color-light) on `%cx-configurator-overview-form` for `topLevel` selector to create the bottom border of the attribute header
+
+- `border-top` set to solid 1px var(--cx-color-light) on `%cx-configurator-overview-form` for `topLevel` selector to create the top border of the attribute header
+
+- `border-left-style` set to none on `%cx-configurator-overview-form` for `topLevel` selector to achieve top-bottom border
+
+- `border-right-style` set to none on `%cx-configurator-overview-form` for `topLevel` selector to achieve top-bottom border
+
+- `background` set to none on `%cx-configurator-overview-form` for `topLevel` to make the header background transparent
+
+- `text-transform` set to none on `%cx-configurator-overview-form` for `topLevel` to prevent the header form transforming to uppercase
+
+- `margin-bottom` set to -60px on `%cx-configurator-overview-form` for `subgroupTopLevel` to eliminate the space between the top-level attribute header and its subgroups
+
+- `background-color` set to var(--cx-color-background) on `%cx-configurator-overview-form` for `cx-group h2` to set the background color of the subgroup headers
+
+- `font-size` set to 1rem on `%cx-configurator-overview-form` for `cx-group h2` to specify the font size of the subgroup headers
+
+- `text-transform` set to uppercase on `%cx-configurator-overview-form` for `cx-group h2` to transform the subgroup header into uppercase
 
 ## Changes in Configurator Overview Attribute Component
 
-* `width` set to 40% on `%cx-configurator-overview-attribute` for `cx-attribute-value` selector to use only 40% of the width for the small widgets.
+- `width` set to 40% on `%cx-configurator-overview-attribute` for `cx-attribute-value` selector to use only 40% of the width for the small widgets.
+
+- `width` set to 60% on `%cx-configurator-overview-attribute` for `cx-attribute-label` selector to use only 60% of the width for the small widgets.
 
-* `width` set to 60% on `%cx-configurator-overview-attribute` for `cx-attribute-label` selector to use only 60% of the width for the small widgets.
+- `font-weight` set to 600 on `%cx-configurator-overview-attribute` for `cx-attribute-value` to make the attribute values bold
diff --git a/feature-libs/product-configurator/rulebased/components/overview-form/configurator-overview-form.component.html b/feature-libs/product-configurator/rulebased/components/overview-form/configurator-overview-form.component.html
index c975fd4c1d1..7908fcaab51 100644
--- a/feature-libs/product-configurator/rulebased/components/overview-form/configurator-overview-form.component.html
+++ b/feature-libs/product-configurator/rulebased/components/overview-form/configurator-overview-form.component.html
@@ -1,37 +1,14 @@
 <ng-container *ngIf="configuration$ | async as configuration">
   <ng-container *ngIf="hasAttributes(configuration); else noAttributes">
-    <ng-container *ngFor="let group of configuration.overview.groups">
-      <div class="cx-group">
-        <h2>
-          <span>{{ group.groupDescription }}</span>
-        </h2>
-        <div
-          *ngFor="let attributeOverview of group.attributes; let i = index"
-          class="cx-attribute-value-pair"
-          [ngClass]="getStyleClasses(group.attributes, i)"
-        >
-          <ng-container [ngSwitch]="attributeOverview?.type">
-            <ng-container *ngSwitchCase="attributeOverviewType.GENERAL">
-              <cx-configurator-overview-attribute
-                [attributeOverview]="attributeOverview"
-              ></cx-configurator-overview-attribute>
-            </ng-container>
-
-            <ng-container *ngSwitchCase="attributeOverviewType.BUNDLE">
-              <cx-configurator-cpq-overview-attribute
-                [attributeOverview]="attributeOverview"
-              ></cx-configurator-cpq-overview-attribute>
-            </ng-container>
-
-            <ng-container *ngSwitchDefault>
-              <cx-configurator-overview-attribute
-                [attributeOverview]="attributeOverview"
-              ></cx-configurator-overview-attribute>
-            </ng-container>
-          </ng-container>
-        </div>
-      </div>
-    </ng-container>
+    <ng-container
+      *ngTemplateOutlet="
+        groups;
+        context: {
+          overviewGroups: configuration.overview.groups,
+          level: 1
+        }
+      "
+    ></ng-container>
   </ng-container>
 </ng-container>
 
@@ -42,3 +19,54 @@ <h2>{{ 'configurator.overviewForm.noAttributeHeader' | cxTranslate }}</h2>
     <p>{{ 'configurator.overviewForm.noAttributeText' | cxTranslate }}</p>
   </div>
 </ng-template>
+
+<ng-template #groups let-overviewGroups="overviewGroups" let-level="level">
+  <ng-container *ngFor="let group of overviewGroups">
+    <div
+      class="cx-group"
+      [class.topLevel]="level === 1"
+      [class.subgroupTopLevel]="level === 1 && group.subGroups?.length > 0"
+    >
+      <h2>
+        <span>{{ group.groupDescription }}</span>
+      </h2>
+
+      <div
+        *ngFor="let attributeOverview of group.attributes; let i = index"
+        class="cx-attribute-value-pair"
+        [ngClass]="getStyleClasses(group.attributes, i)"
+      >
+        <ng-container [ngSwitch]="attributeOverview?.type">
+          <ng-container *ngSwitchCase="attributeOverviewType.GENERAL">
+            <cx-configurator-overview-attribute
+              [attributeOverview]="attributeOverview"
+            >
+            </cx-configurator-overview-attribute>
+          </ng-container>
+
+          <ng-container *ngSwitchCase="attributeOverviewType.BUNDLE">
+            <cx-configurator-cpq-overview-attribute
+              [attributeOverview]="attributeOverview"
+            >
+            </cx-configurator-cpq-overview-attribute>
+          </ng-container>
+
+          <ng-container *ngSwitchDefault>
+            <cx-configurator-overview-attribute
+              [attributeOverview]="attributeOverview"
+            >
+            </cx-configurator-overview-attribute>
+          </ng-container>
+        </ng-container>
+      </div>
+    </div>
+    <ng-container *ngIf="group.subGroups?.length > 0">
+      <ng-container
+        *ngTemplateOutlet="
+          groups;
+          context: { overviewGroups: group.subGroups, level: level + 1 }
+        "
+      ></ng-container>
+    </ng-container>
+  </ng-container>
+</ng-template>
diff --git a/feature-libs/product-configurator/rulebased/core/model/configurator.model.ts b/feature-libs/product-configurator/rulebased/core/model/configurator.model.ts
index ce20bb652cb..6369aa37210 100644
--- a/feature-libs/product-configurator/rulebased/core/model/configurator.model.ts
+++ b/feature-libs/product-configurator/rulebased/core/model/configurator.model.ts
@@ -92,6 +92,7 @@ export namespace Configurator {
     id: string;
     groupDescription?: string;
     attributes?: AttributeOverview[];
+    subGroups?: GroupOverview[];
   }
 
   export interface AttributeOverview {
diff --git a/feature-libs/product-configurator/rulebased/occ/variant/converters/occ-configurator-variant-overview-normalizer.spec.ts b/feature-libs/product-configurator/rulebased/occ/variant/converters/occ-configurator-variant-overview-normalizer.spec.ts
index fef8bd9a8c4..8b205629b91 100644
--- a/feature-libs/product-configurator/rulebased/occ/variant/converters/occ-configurator-variant-overview-normalizer.spec.ts
+++ b/feature-libs/product-configurator/rulebased/occ/variant/converters/occ-configurator-variant-overview-normalizer.spec.ts
@@ -35,11 +35,13 @@ const convertedOverview: Configurator.Overview = {
           value: 'V1',
         },
       ],
-    },
-    {
-      id: '11',
-      groupDescription: undefined,
-      attributes: [],
+      subGroups: [
+        {
+          id: '11',
+          groupDescription: undefined,
+          attributes: [],
+        },
+      ],
     },
     {
       id: '2',
@@ -74,16 +76,17 @@ Object.freeze(group3);
 const subGroups: OccConfigurator.GroupOverview[] = [group3];
 Object.freeze(subGroups);
 
+const subgroup: OccConfigurator.GroupOverview = { id: '11' };
 const group1: OccConfigurator.GroupOverview = {
   id: '1',
   groupDescription: groupDescription,
-  subGroups: [{ id: '11' }],
   characteristicValues: [
     {
       characteristic: 'C1',
       value: 'V1',
     },
   ],
+  subGroups: [subgroup],
 };
 Object.freeze(group1);
 
@@ -158,7 +161,7 @@ describe('OccConfiguratorVariantNormalizer', () => {
 
   it('should cover sub groups', () => {
     const result = occConfiguratorVariantOverviewNormalizer.convert(overview);
-    expect(result.groups.length).toBe(3);
+    expect(result.groups?.length).toBe(2);
   });
 
   it('should be able to handle groups without attributes', () => {
@@ -181,7 +184,31 @@ describe('OccConfiguratorVariantNormalizer', () => {
     const result = occConfiguratorVariantOverviewNormalizer.convertGroup(
       groupWithSubgroups
     );
-    expect(result.length).toBe(5);
+    expect(result.length).toBe(1);
+  });
+
+  it('should fill subgroups in the target model accross 3 levels', () => {
+    const thirdLevelGroup: OccConfigurator.GroupOverview = {};
+    const secondLevelGroup: OccConfigurator.GroupOverview = {
+      subGroups: [thirdLevelGroup],
+    };
+    const groupWithSubgroups: OccConfigurator.GroupOverview = {
+      subGroups: [group1, group3, secondLevelGroup],
+    };
+
+    const result = occConfiguratorVariantOverviewNormalizer.convertGroup(
+      groupWithSubgroups
+    );
+    const rootGroup = result[0];
+    expect(rootGroup).toBeDefined();
+    const subGroups = rootGroup.subGroups;
+    if (subGroups) {
+      expect(subGroups.length).toBe(3);
+      const secondLevelGroupInResult = subGroups[2];
+      expect(secondLevelGroupInResult.subGroups?.length).toBe(1);
+    } else {
+      fail();
+    }
   });
   it('should set description for a general group', () => {
     const generalTargetGroup: Configurator.GroupOverview = {
diff --git a/feature-libs/product-configurator/rulebased/occ/variant/converters/occ-configurator-variant-overview-normalizer.ts b/feature-libs/product-configurator/rulebased/occ/variant/converters/occ-configurator-variant-overview-normalizer.ts
index 86065717dab..547e02afb10 100644
--- a/feature-libs/product-configurator/rulebased/occ/variant/converters/occ-configurator-variant-overview-normalizer.ts
+++ b/feature-libs/product-configurator/rulebased/occ/variant/converters/occ-configurator-variant-overview-normalizer.ts
@@ -43,8 +43,7 @@ export class OccConfiguratorVariantOverviewNormalizer
     const characteristicValues: OccConfigurator.CharacteristicOverview[] =
       source.characteristicValues;
     const subGroups: OccConfigurator.GroupOverview[] = source.subGroups;
-
-    result.push({
+    const group: Configurator.GroupOverview = {
       id: source.id,
       groupDescription: source.groupDescription,
       attributes: characteristicValues
@@ -55,15 +54,18 @@ export class OccConfiguratorVariantOverviewNormalizer
             };
           })
         : [],
-    });
-    this.setGeneralDescription(result[0]);
+    };
+
+    this.setGeneralDescription(group);
     if (subGroups) {
+      group.subGroups = [];
       subGroups.forEach((subGroup) =>
         this.convertGroup(subGroup).forEach((groupArray) =>
-          result.push(groupArray)
+          group.subGroups.push(groupArray)
         )
       );
     }
+    result.push(group);
     return result;
   }
 
diff --git a/feature-libs/product-configurator/rulebased/styles/_configurator-overview-attribute.scss b/feature-libs/product-configurator/rulebased/styles/_configurator-overview-attribute.scss
index 119d8c45776..54ba36fd751 100644
--- a/feature-libs/product-configurator/rulebased/styles/_configurator-overview-attribute.scss
+++ b/feature-libs/product-configurator/rulebased/styles/_configurator-overview-attribute.scss
@@ -6,6 +6,7 @@
 
   .cx-attribute-value {
     width: 100%;
+    font-weight: 600;
 
     @include media-breakpoint-up(md) {
       width: 41.6666666667%;
diff --git a/feature-libs/product-configurator/rulebased/styles/_configurator-overview-form.scss b/feature-libs/product-configurator/rulebased/styles/_configurator-overview-form.scss
index 886669561c2..579bf90b377 100644
--- a/feature-libs/product-configurator/rulebased/styles/_configurator-overview-form.scss
+++ b/feature-libs/product-configurator/rulebased/styles/_configurator-overview-form.scss
@@ -44,6 +44,23 @@
       }
     }
 
+    &.topLevel {
+      h2 {
+        font-size: 1.25rem;
+        font-weight: 700;
+        border-bottom: solid 1px var(--cx-color-light);
+        border-top: solid 1px var(--cx-color-light);
+        border-left-style: none;
+        border-right-style: none;
+        background: none;
+        text-transform: none;
+      }
+    }
+
+    &.subgroupTopLevel {
+      margin-bottom: -60px;
+    }
+
     h2 {
       padding-inline-start: 30px;
       padding-inline-end: 30px;
@@ -65,6 +82,9 @@
       }
 
       border: solid 1px var(--cx-color-light);
+      background-color: var(--cx-color-background);
+      font-size: 1rem;
+      text-transform: uppercase;
 
       @include forVersion(3.3) {
         span {