Exhaust Manifold for Mercruiser Big Block 7.4L 454 8.2L 502 applications.
This center riser Exhaust Manifold was used on GM Big Block Engines From 1983 & Newer.
The Barr Brand is a MADE IN USA Product and has a 3 year warranty against Manufacturers defects!
Comes with pictured gaskets and mounting hardware and already painted black!!NOTE:
Replaces Mercruiser #s:
GLM # 51240
Sierra # 18-1957-1
Mallory # 9-40506