Dynatech SB Chevy Stahl Header Adapter H759C04S This High Inertia billet steel

This High Inertia billet steel flywheel helps the engine maintain RPM's in rough terrain

and instructions

This part number includes catalytic converters

or as an added sound decoupler with Boom Mat vibration dampening material

Weighs over 50-percent less than stock motor mounts

Dynatech SB Chevy Stahl Header Adapter H759C04S This High Inertia billet steelProduct Description: Header Flange Adapter 0. 625 in Thick 1. 125 in Square Port Left Right Side Included Aluminum Small Block Chevy to Stahl Pattern Dynatech continues to be the exhaust leader in all forms of racing and high performance applications. You can be assured that you will get all the performance and quality possible from your Dynatech headers.