1/4in GM TBI Riser Plate

The 1/4in GM TBI Riser Plate from TRANS-DAPT is a vital spacer designed for General Motors Throttle Body Injection engines that are undergoing intake manifold modifications. This riser plate elevates the throttle body assembly away from the intake surface, providing essential clearance for carburetor stacks, fuel injection upgrades, or custom intake manifold work. It is ideal for high-performance street engines, classic GM restorations, or adapting modern fuel delivery systems to vintage blocks.

Manufactured to precise tolerances, the 1/4in GM TBI Riser Plate maintains a consistent 0.25-inch standoff height to ensure proper gasket sealing and component alignment without compromising intake port flow characteristics. Its compact footprint and lightweight design minimize rotational inertia and installation complexity while providing the necessary support for reliable throttle body operation under boost or high-RPM conditions. This precision machining ensures that vacuum line routing, coolant passages, and fuel supply connections remain accessible and unobstructed.

Engine builders, restoration shops, and DIY enthusiasts working with GM TBI platforms—including first-generation Camaros and small-block Chevys—will find this riser plate invaluable for overcoming fitment challenges during engine bay modifications. Its design is tailored to facilitate seamless integration of aftermarket fuel systems or custom intake manifolds into OEM engine bays, making it a versatile choice for various applications.