MPFI Throttle Body 1000 CFM Polished

The HOLLEY MPFI Throttle Body 1000 CFM Polished (part number 112-588) is a square-bore, four-barrel aluminum throttle body engineered for fuel-injected engine swap applications and performance builds. Designed with a 1000 cubic feet per minute rating, this polished aluminum unit delivers consistent air metering control for carbureted-to-fuel-injection conversions and high-flow engine upgrades. The unit ships with both GM IAC and TPS sensors pre-installed, eliminating the need for separate sensor procurement and reducing installation complexity on vehicles requiring factory-style sensor integration.

At 1000 CFM, this throttle body accommodates engine packages in the 400–500 horsepower range, making it suitable for moderate to high-performance applications. The square-bore design ensures compatibility with traditional intake manifold bolt patterns while the included GM IAC and TPS sensor provisions allow direct integration with modern fuel-injection controllers and engine management systems. The polished aluminum finish resists corrosion and provides a clean appearance in engine bays where aesthetics matter. Universal mounting configuration means fitment verification against specific intake manifold port sizing is essential before purchase.

This throttle body serves builders transitioning from carburetor to fuel injection, engine swap enthusiasts needing precise air control in non-original platforms, and performance shops standardizing on quality OEM-style components for reliability and tuneability. The four-barrel design mimics traditional multi-barrel carburetor architecture, which many builders find intuitive for tuning and diagnostics. HOLLEY throttle bodies are established in automotive performance circles for maintaining flow consistency and sensor stability under varying load conditions.