Holley EFI Billet Throttle Body 105mm with Tapered Bore for LS Engines, Part #112-581

Holley’s BILLET LS Throttle Bodies are the BIGGEST BORE - MOST FEATURE LOADED available. Holley went back to the drawing board and built the ultimate air valve for your LS engine! This all new design boasts a 105 millimeter bore and a low RPM drive friendly taper. Innovative features like Idle Bleed Adjustment, TPS CLOCKER, and closable PCV Passage Valve, make them the ultimate throttle bodies for ease of installation and tuning. Regardless of whether you have a turbo, supercharger, or a big cam engine sucking gulps of air, Holley’s throttle bodies are maximized for your application. The barrier protection of the BLACK ANODIZED finish also offers up a modern tech look! Features: TPS CLOCKER allows the TPS to be rotated back into the ECU's required idle voltage range. Modified engines no longer suffer from problems related to TPS voltage! IDLE BLEED allows adjustment of your idle without affecting throttle position or TPS voltages at idle! PCV PASSAGE VALVE closes to accommodate forced induction applications! No more plugging to block off PCV! OVERSIZED BORE compared to other LS throttle bodies TAPERED TRANSITION eliminates low RPM drivability issues PREMIUM BILLET BODY supports the high tolerance design and look your performance engine deserves! BLACK ANODIZED FINISH for superior corrosion resistance and serious good looks CRUISE CONTROL provision built in for cruise control cable CABLE DRIVEN APPLICATION Fits the following intake manifolds: Holley 105mm Hi-Ram, Fast™ LSXR & LSXRT, MSD® Atomic AirForce, Most other 102 through 105mm LS intakes using 4 bolt TBs