Bores are tapered in to adapt the wider TBI unit to the narrow Holley edelbrock pattern 4bl manifold. This is very important many adapters don't have this feature. when it is really the adapter. High quality felt base gasket and Felpro TBI gasket.
44mm TBI throttle body injection to 4 barrel intake manifold adapter Chevy GM
For Chevy Intake Manifold Adapter TBI Fuel Injection to 4Barrel Manifold Holley
1set Intake Manifold Adapter For Chevy TBI Fuel Injection to 4Barrel Manifold
50mm TBI throttle body to 4 barrel intake manifold adapter fits Chevy GM Holley
For Chevy TBI Throttle For Holley 4412 2300 Intake Manifold Adapter Kit
Chevy TBI Onto Holley Edelbrock 4 Barrel Intake Manifold Adapter 2" Open
