The Holley 112-581 105mm throttle body for GM LS engines fits the following intake manifolds:
- Holley 105mm Hi-Ram
- FAST™ LSXR and LSXRT
- MSD® Atomic AirForce
- Most other 102mm through 105mm LS intakes using 4-Bolt Throttle Bodies
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!
Not Sure? Review this product documentation before you buy!
Instruction Guide
Holley GM LS Throttle Body Installation Guide (90mm - 105mm)
| Throttle Bodies | |
| Barrels (BBL) | 1 |
| Style | Multi-Point Fuel Injection |
| Throttle Bore Diameter (ea) | 105 mm |
| TPS Sensor Included | Yes |
| General | |
| Also Included | Tapered transition to eliminate Low RPM drivability issues |
| Application | Holley 105mm Hi-Ram, Fast LSXR & LSXRT, MSD Atomic AirForce and most other 102mm through 105mm LS Intakes w/4-Bolt flanges |
| Color | Black Anodized Aluminum |
| Emission Code | 3 - Racing Vehicles Only |
| Material | Billet Aluminum |
| OEM Replacement | No |
| Unit of Sale | Each |
