Throttle Body Spacer for Chevrolet Blazer (1988-1995) 4.3L 5.7L

Precision Billet Throttle Body Spacer for 1988-1995 Chevrolet Blazer

What it Does: Increases intake plenum volume and optimizes fuel atomization between the TBI unit and intake runners to sharpen low-end torque and throttle response.

The Stock Blazer Intake Restriction

Factory GM Throttle Body Injection (TBI) setups on the 4.3L and 5.7L powerplants suffer from restrictive, low-volume plenum space directly beneath the injector bores. This compact geometry produces turbulence and uneven cylinder distribution at lower RPMs. Furthermore, the direct mating of the cast intake creates thermal conduction that increases intake charge temperatures, decreasing overall volumetric efficiency under towing loads.

The Engineering Solution

CNC-machined from billet 6061-T6 aluminum, this spacer expands plenum volume beneath the throttle bores to improve air column inertia. The engineered bore geometry guides intake air smoothly into the runners, enhancing fuel shear and droplet suspension from the dual injectors before combustion. Corrosion-resistant anodizing protects against fuel wash and heat degradation, providing a durable, leak-free mechanical seal using factory fastener torque specifications.

Technical Specifications

Compatibility

• 1988-1995 Chevrolet Blazer 4.3L V6 (TBI Engines)
• 1988-1995 Chevrolet Blazer 5.7L V8 (TBI Engines)
• Fits full-size K5/GMT400 and S-10 Blazer models with standard dual-bore TBI

The Chevrolet Durability Caliber

Engineered to handle the thermal demands and continuous vibration of severe truck service, this direct hardware upgrade bolsters off-idle towing grunt and crawling torque without requiring ECU modifications.