Throttle Body Spacer for Chevrolet C/K Trucks (1988-1995) 4.3L 5.0L 5.7L

Billet Throttle Body Spacer for 1988-1995 Chevrolet C/K Trucks

Function: Increases intake plenum volume and optimizes air velocity directly beneath the factory TBI unit to improve throttle response and off-idle torque.

The Stock C/K Trucks Intake Volume Limitation

The factory Rochester Throttle Body Injection (TBI) assembly on 1988-1995 GMT400 trucks introduces immediate turbulence at the intake manifold transition. Due to compact OEM manifold packaging, the throttle bores feed directly into abrupt floor radiuses, causing intake charge stagnation and sluggish step-off response, particularly under towing or heavy payload demands.

The Engineering Solution

CNC-machined from billet 6061-T6 aluminum, this spacer lengthens the intake tract between the throttle body base and the intake manifold plenum floor. The increased plenum depth smooths the incoming air column, enhancing air-fuel atomization and stabilizing intake runner velocity without requiring computer tuning. An anodized surface finish protects against under-hood thermal cycles and fuel vapor corrosion, ensuring flat, vacuum-tight sealing surfaces that eliminate unmetered air leaks.

Technical Specifications

Compatibility

• 1988-1995 Chevrolet C1500 / K1500 (4.3L V6, 5.0L V8, 5.7L V8 TBI)
• 1988-1995 Chevrolet C2500 / K2500 (4.3L V6, 5.0L V8, 5.7L V8 TBI)
• 1988-1995 Chevrolet C3500 / K3500 (5.7L V8 TBI)

The Chevrolet Durability Standard

Built to withstand extreme duty cycles, hauling demands, and engine bay heat soak, this hardware upgrade restores crisp mechanical throttle operation and usable low-end pulling power with zero ECU reprogramming required.