Mercruiser V8 Center Rise Exhaust Manifold (SIERRA P/N 18-1957-1) (#S1819571)

• Mercruiser V8 Center Rise Exhaust Manifold
• Center rise direct replacement exhaust manifold for Mercruiser V8 big block 330 340 and 454 cu. in. magnum model engines from 1995 and prior
• Will not work for engines manufactured between 1996 to 1999 due to manifold casting making contact with head bolts