Holley 112-581 GM LS EFI Throttle Body 105mm with Tapered BoreGM LS EFI Thottle Body 105mm w Tapered Bore Upgrade your engine's performance with the Holley 112 581 GM LS EFI Throttle Body. Designed specifically for the GM LS Series, this throttle body features a 105mm tapered bore that enhances airflow, allowing your engine to breathe better and perform at its peak. Constructed from high quality aluminum and finished with a sleek black anodized coating, this throttle body not only looks great but also offers