XB4 D Block

We offer several D Block options to fine-tune the performance, stability, and agility of your XB4.

1° D Block (Standard Option)

The 1° D Block gives you easy access to both 1° and 0° toe settings, with multiple pivot width configurations to fine-tune feel. Narrowing the pivot width trades some corner rotation speed for increased grip and stability. This makes it an excellent choice for Modified drivers and medium- to low-grip artificial surfaces, where predictability and confidence are key.

Pairs with the stock Wide C Block.

+2 HRC 1° D Block

Building on the standard 1° D Block, the +2 HRC version adds a higher roll center for a more nimble, faster-reacting car. When grip is available, this block shines on small- to medium-sized tracks with medium to low grip, delivering quick response and precision with any motor size.

Pairs with the Hot Lap Designs +2 HRC C Block.

+2 HRC D Block

The +2 HRC D Block is the ultimate option for stock-class performance. It maintains the swift turning the XB4 platform is known for while adding the agility and responsiveness associated with higher roll center geometry. This block excels in Stock Racing and performs best on medium- to high-grip tracks, especially medium- to large-sized layouts.

 Pairs with the Hot Lap Designs +2 HRC C Block either in Standard or +2 Toe Variations.

All D Blocks are machined from US-sourced 7075-T6 aluminum for maximum strength and durability, making them a premium upgrade for any XB4.