T4 Riser Block (Without Wastegate Port)

Features:

• 2 3/8-inch riser block height
• T4 flange for larger turbo fitment
• No wastegate port included
• Ideal for GT40, GT42R, or larger
• Includes studs and nuts for install
• Durable construction for race use
• Compatible with purpose-built vehicles
• Not legal for highway or off-road use
• California legal for race vehicles only
• Designed to improve turbo placement

T4 Riser Block for HD GM Trucks

If you're building a serious race-ready Duramax setup, dialing in your turbo fitment is crucial—and that’s where the PPE T4 Riser Block comes into play. Designed specifically for purpose-built competition vehicles running larger turbos like the GT40, GT42R, or similar, this 2 3/8-inch tall riser block gives you the extra clearance you need for clean and proper turbo positioning. Whether you’re fabricating a custom up-pipe or just making room in a tight engine bay, this block adds just the right amount of lift without introducing unnecessary complexity.

High-Quality Construction

Made from high-quality materials and machined for a precise fit, this riser block includes four studs and four nuts to make installation as straightforward as possible. It features a standard T4 flange and comes without a wastegate port, keeping the setup simple and streamlined for race applications. Just a heads up—this part is not legal for highway or off-road use in California and is intended only for race vehicles that will never be registered for street driving.

Fits: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Application Notes:

• An additional T4 flange riser block is sometimes required for turbos (GT40, GT42R, or larger).
• THIS PRODUCT ONLY FITS PURPOSE-BUILT VEHICLES.
• LEGAL IN CALIFORNIA ONLY FOR RACING VEHICLES THAT MAY NEVER BE USED, REGISTERED, OR LICENSED FOR HIGHWAY OR OFF-ROAD USE.