diff --git a/scss/_nav.scss b/scss/_nav.scss
index 707dec7f7e..1058629f28 100644
--- a/scss/_nav.scss
+++ b/scss/_nav.scss
@@ -12,8 +12,9 @@
 }
 
 .nav-link {
-  display: block;
+  display: flex; // Boosted mod
   padding: $nav-link-padding-y $nav-link-padding-x;
+  font-weight: $font-weight-bold; // Boosted mod
   text-decoration: if($link-decoration == none, null, none);
 
   &:hover,
@@ -34,7 +35,8 @@
 //
 
 .nav-tabs {
-  border-bottom: $nav-tabs-border-width solid $nav-tabs-border-color;
+  --bs-tabs-spacing: #{$nav-tabs-border-width};
+  border-bottom: var(--bs-tabs-spacing) solid $nav-tabs-border-color;
 
   // Boosted mod: margins between tabs on bigger screen
   @include media-breakpoint-up(lg) {
@@ -46,8 +48,10 @@
 
   .nav-link {
     padding: $navbar-padding-y map-get($spacers, 4); // Boosted mod
-    margin-bottom: -$nav-tabs-border-width;
-    border: $nav-tabs-border-width solid transparent;
+    // stylelint-disable-next-line function-blacklist
+    margin-bottom: calc(var(--bs-tabs-spacing) * -1);
+    background: none; // Boosted mod: prevent dropdown background to interfere
+    border: var(--bs-tabs-spacing) solid transparent;
     border-bottom-width: 0; // Boosted mod
     @include border-top-radius($nav-tabs-border-radius);
 
@@ -74,12 +78,35 @@
 
   .dropdown-menu {
     // Make dropdown border overlap tab border
-    margin-top: -$nav-tabs-border-width;
+    // stylelint-disable-next-line function-blacklist
+    margin-top: calc(var(--bs-tabs-spacing) * -1);
     // Remove the top rounded corners here since there is a hard edge above the menu
     @include border-top-radius(0);
   }
 }
 
+// Boosted mod
+.nav-tabs-light {
+  --bs-tabs-spacing: #{$nav-tabs-border-width / 2};
+  border-color: $gray-600;
+
+  .nav-link {
+    // stylelint-disable-next-line function-blacklist
+    border-width: 0 0 calc(var(--bs-tabs-spacing) * 4);
+
+    &:hover,
+    &:focus {
+      color: $primary;
+      background: none;
+      border-color: transparent;
+    }
+
+    &.active {
+      border-bottom-color: $primary;
+    }
+  }
+}
+// End mod
 
 //
 // Pills
@@ -95,6 +122,12 @@
     color: $nav-pills-link-active-color;
     background-color: $nav-pills-link-active-bg;
   }
+
+  // Boosted mod
+  .nav-item + .nav-item {
+    margin-left: $nav-link-padding-y / 2;
+  }
+  // End mod
 }
 
 
@@ -123,6 +156,12 @@
 // Hide tabbable panes to start, show them when `.active`
 
 .tab-content {
+  // Boosted mod
+  padding: subtract($spacer, $nav-tabs-border-width);
+  border: $nav-tabs-border-width solid;
+  border-top: 0;
+  // End mod
+
   > .tab-pane {
     display: none;
   }
diff --git a/site/content/docs/4.3/components/navs.md b/site/content/docs/4.3/components/navs.md
index 3879e157de..9ae569ae98 100644
--- a/site/content/docs/4.3/components/navs.md
+++ b/site/content/docs/4.3/components/navs.md
@@ -145,6 +145,30 @@ Takes the basic nav from above and adds the `.nav-tabs` class to generate a tabb
 </ul>
 {{< /example >}}
 
+<!-- Boosted mod -->
+### Tabs light
+
+
+Nav tabs light only differ visually, with a full width bottom border and a different active state.
+
+{{< example >}}
+<ul class="nav nav-tabs nav-tabs-light">
+  <li class="nav-item">
+    <a class="nav-link active" href="#" aria-current="page">Active</a>
+  </li>
+  <li class="nav-item">
+    <a class="nav-link" href="#">Link</a>
+  </li>
+  <li class="nav-item">
+    <a class="nav-link" href="#">Link</a>
+  </li>
+  <li class="nav-item">
+    <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
+  </li>
+</ul>
+{{< /example >}}
+<!-- End mod -->
+
 ### Pills
 
 Take that same HTML, but use `.nav-pills` instead:
@@ -312,7 +336,7 @@ Dynamic tabbed interfaces, as described in the [<abbr title="Web Accessibility I
 Note that dynamic tabbed interfaces should <em>not</em> contain dropdown menus, as this causes both usability and accessibility issues. From a usability perspective, the fact that the currently displayed tab's trigger element is not immediately visible (as it's inside the closed dropdown menu) can cause confusion. From an accessibility point of view, there is currently no sensible way to map this sort of construct to a standard WAI ARIA pattern, meaning that it cannot be easily made understandable to users of assistive technologies.
 
 <div class="bd-example">
-  <ul class="nav nav-tabs mb-3" id="myTab" role="tablist">
+  <ul class="nav nav-tabs" id="myTab" role="tablist">
     <li class="nav-item" role="presentation">
       <a class="nav-link active" id="home-tab" data-toggle="tab" href="#home" role="tab" aria-controls="home" aria-selected="true">Home</a>
     </li>
@@ -325,13 +349,13 @@ Note that dynamic tabbed interfaces should <em>not</em> contain dropdown menus,
   </ul>
   <div class="tab-content" id="myTabContent">
     <div class="tab-pane fade show active" id="home" role="tabpanel" aria-labelledby="home-tab">
-      <p>Raw denim you probably haven't heard of them jean shorts Austin. Nesciunt tofu stumptown aliqua, retro synth master cleanse. Mustache cliche tempor, williamsburg carles vegan helvetica. Reprehenderit butcher retro keffiyeh dreamcatcher synth. Cosby sweater eu banh mi, qui irure terry richardson ex squid. Aliquip placeat salvia cillum iphone. Seitan aliquip quis cardigan american apparel, butcher voluptate nisi qui.</p>
+      <p class="mb-0">Raw denim you probably haven't heard of them jean shorts Austin. Nesciunt tofu stumptown aliqua, retro synth master cleanse. Mustache cliche tempor, williamsburg carles vegan helvetica. Reprehenderit butcher retro keffiyeh dreamcatcher synth. Cosby sweater eu banh mi, qui irure terry richardson ex squid. Aliquip placeat salvia cillum iphone. Seitan aliquip quis cardigan american apparel, butcher voluptate nisi qui.</p>
     </div>
     <div class="tab-pane fade" id="profile" role="tabpanel" aria-labelledby="profile-tab">
-      <p>Food truck fixie locavore, accusamus mcsweeney's marfa nulla single-origin coffee squid. Exercitation +1 labore velit, blog sartorial PBR leggings next level wes anderson artisan four loko farm-to-table craft beer twee. Qui photo booth letterpress, commodo enim craft beer mlkshk aliquip jean shorts ullamco ad vinyl cillum PBR. Homo nostrud organic, assumenda labore aesthetic magna delectus mollit. Keytar helvetica VHS salvia yr, vero magna velit sapiente labore stumptown. Vegan fanny pack odio cillum wes anderson 8-bit, sustainable jean shorts beard ut DIY ethical culpa terry richardson biodiesel. Art party scenester stumptown, tumblr butcher vero sint qui sapiente accusamus tattooed echo park.</p>
+      <p class="mb-0">Food truck fixie locavore, accusamus mcsweeney's marfa nulla single-origin coffee squid. Exercitation +1 labore velit, blog sartorial PBR leggings next level wes anderson artisan four loko farm-to-table craft beer twee. Qui photo booth letterpress, commodo enim craft beer mlkshk aliquip jean shorts ullamco ad vinyl cillum PBR. Homo nostrud organic, assumenda labore aesthetic magna delectus mollit. Keytar helvetica VHS salvia yr, vero magna velit sapiente labore stumptown. Vegan fanny pack odio cillum wes anderson 8-bit, sustainable jean shorts beard ut DIY ethical culpa terry richardson biodiesel. Art party scenester stumptown, tumblr butcher vero sint qui sapiente accusamus tattooed echo park.</p>
     </div>
     <div class="tab-pane fade" id="contact" role="tabpanel" aria-labelledby="contact-tab">
-      <p>Etsy mixtape wayfarers, ethical wes anderson tofu before they sold out mcsweeney's organic lomo retro fanny pack lo-fi farm-to-table readymade. Messenger bag gentrify pitchfork tattooed craft beer, iphone skateboard locavore carles etsy salvia banksy hoodie helvetica. DIY synth PBR banksy irony. Leggings gentrify squid 8-bit cred pitchfork. Williamsburg banh mi whatever gluten-free, carles pitchfork biodiesel fixie etsy retro mlkshk vice blog. Scenester cred you probably haven't heard of them, vinyl craft beer blog stumptown. Pitchfork sustainable tofu synth chambray yr.</p>
+      <p class="mb-0">Etsy mixtape wayfarers, ethical wes anderson tofu before they sold out mcsweeney's organic lomo retro fanny pack lo-fi farm-to-table readymade. Messenger bag gentrify pitchfork tattooed craft beer, iphone skateboard locavore carles etsy salvia banksy hoodie helvetica. DIY synth PBR banksy irony. Leggings gentrify squid 8-bit cred pitchfork. Williamsburg banh mi whatever gluten-free, carles pitchfork biodiesel fixie etsy retro mlkshk vice blog. Scenester cred you probably haven't heard of them, vinyl craft beer blog stumptown. Pitchfork sustainable tofu synth chambray yr.</p>
     </div>
   </div>
 </div>
@@ -359,7 +383,7 @@ To help fit your needs, this works with `<ul>`-based markup, as shown above, or
 
 <div class="bd-example">
   <nav>
-    <div class="nav nav-tabs mb-3" id="nav-tab" role="tablist">
+    <div class="nav nav-tabs" id="nav-tab" role="tablist">
       <a class="nav-item nav-link active" id="nav-home-tab" data-toggle="tab" href="#nav-home" role="tab" aria-controls="nav-home" aria-selected="true">Home</a>
       <a class="nav-item nav-link" id="nav-profile-tab" data-toggle="tab" href="#nav-profile" role="tab" aria-controls="nav-profile" aria-selected="false">Profile</a>
       <a class="nav-item nav-link" id="nav-contact-tab" data-toggle="tab" href="#nav-contact" role="tab" aria-controls="nav-contact" aria-selected="false">Contact</a>
@@ -367,13 +391,13 @@ To help fit your needs, this works with `<ul>`-based markup, as shown above, or
   </nav>
   <div class="tab-content" id="nav-tabContent">
     <div class="tab-pane fade show active" id="nav-home" role="tabpanel" aria-labelledby="nav-home-tab">
-      <p>Et et consectetur ipsum labore excepteur est proident excepteur ad velit occaecat qui minim occaecat veniam. Fugiat veniam incididunt anim aliqua enim pariatur veniam sunt est aute sit dolor anim. Velit non irure adipisicing aliqua ullamco irure incididunt irure non esse consectetur nostrud minim non minim occaecat. Amet duis do nisi duis veniam non est eiusmod tempor incididunt tempor dolor ipsum in qui sit. Exercitation mollit sit culpa nisi culpa non adipisicing reprehenderit do dolore. Duis reprehenderit occaecat anim ullamco ad duis occaecat ex.</p>
+      <p class="mb-0">Et et consectetur ipsum labore excepteur est proident excepteur ad velit occaecat qui minim occaecat veniam. Fugiat veniam incididunt anim aliqua enim pariatur veniam sunt est aute sit dolor anim. Velit non irure adipisicing aliqua ullamco irure incididunt irure non esse consectetur nostrud minim non minim occaecat. Amet duis do nisi duis veniam non est eiusmod tempor incididunt tempor dolor ipsum in qui sit. Exercitation mollit sit culpa nisi culpa non adipisicing reprehenderit do dolore. Duis reprehenderit occaecat anim ullamco ad duis occaecat ex.</p>
     </div>
     <div class="tab-pane fade" id="nav-profile" role="tabpanel" aria-labelledby="nav-profile-tab">
-      <p>Nulla est ullamco ut irure incididunt nulla Lorem Lorem minim irure officia enim reprehenderit. Magna duis labore cillum sint adipisicing exercitation ipsum. Nostrud ut anim non exercitation velit laboris fugiat cupidatat. Commodo esse dolore fugiat sint velit ullamco magna consequat voluptate minim amet aliquip ipsum aute laboris nisi. Labore labore veniam irure irure ipsum pariatur mollit magna in cupidatat dolore magna irure esse tempor ad mollit. Dolore commodo nulla minim amet ipsum officia consectetur amet ullamco voluptate nisi commodo ea sit eu.</p>
+      <p class="mb-0">Nulla est ullamco ut irure incididunt nulla Lorem Lorem minim irure officia enim reprehenderit. Magna duis labore cillum sint adipisicing exercitation ipsum. Nostrud ut anim non exercitation velit laboris fugiat cupidatat. Commodo esse dolore fugiat sint velit ullamco magna consequat voluptate minim amet aliquip ipsum aute laboris nisi. Labore labore veniam irure irure ipsum pariatur mollit magna in cupidatat dolore magna irure esse tempor ad mollit. Dolore commodo nulla minim amet ipsum officia consectetur amet ullamco voluptate nisi commodo ea sit eu.</p>
     </div>
     <div class="tab-pane fade" id="nav-contact" role="tabpanel" aria-labelledby="nav-contact-tab">
-      <p>Sint sit mollit irure quis est nostrud cillum consequat Lorem esse do quis dolor esse fugiat sunt do. Eu ex commodo veniam Lorem aliquip laborum occaecat qui Lorem esse mollit dolore anim cupidatat. Deserunt officia id Lorem nostrud aute id commodo elit eiusmod enim irure amet eiusmod qui reprehenderit nostrud tempor. Fugiat ipsum excepteur in aliqua non et quis aliquip ad irure in labore cillum elit enim. Consequat aliquip incididunt ipsum et minim laborum laborum laborum et cillum labore. Deserunt adipisicing cillum id nulla minim nostrud labore eiusmod et amet. Laboris consequat consequat commodo non ut non aliquip reprehenderit nulla anim occaecat. Sunt sit ullamco reprehenderit irure ea ullamco Lorem aute nostrud magna.</p>
+      <p class="mb-0">Sint sit mollit irure quis est nostrud cillum consequat Lorem esse do quis dolor esse fugiat sunt do. Eu ex commodo veniam Lorem aliquip laborum occaecat qui Lorem esse mollit dolore anim cupidatat. Deserunt officia id Lorem nostrud aute id commodo elit eiusmod enim irure amet eiusmod qui reprehenderit nostrud tempor. Fugiat ipsum excepteur in aliqua non et quis aliquip ad irure in labore cillum elit enim. Consequat aliquip incididunt ipsum et minim laborum laborum laborum et cillum labore. Deserunt adipisicing cillum id nulla minim nostrud labore eiusmod et amet. Laboris consequat consequat commodo non ut non aliquip reprehenderit nulla anim occaecat. Sunt sit ullamco reprehenderit irure ea ullamco Lorem aute nostrud magna.</p>
     </div>
   </div>
 </div>