This throttle bracket is designed specifically for the Holley Modular Ultra Lo-Ram EFI Manifold 300-621 and 300-621BK front-feed intake manifolds using the 105mm throttle bodies. The bracket design has allowance for throttle pedal adjustment or the addition of a nitrous plate. This bracket works with throttle cables from 1998-2002 5.7L Chevrolet Camaro and Firebird (GM Part # 12563339).