GLM Manifolds are Superior in the Aftermarket Marine Parts Industry. Designed to Increase Performance, Reduce Back Pressure and Add More Horsepower to Your Engine! Our fully tuned design guides exhaust gases directly to riser without turbulence and back pressure. This increases the engines performace up to 10%. In the meantime, an additional 40% water cooling area will decrease the entire manifold body temperature significantly.
Our Manifolds include gaskets,plugs and studs !!! Others have to be purchased separately !!
Manifolds for your 305 // 350 V8 GM Chevy // Mercruiser engine - brand new in box. #51230 Manifolds for your Big Block 454 502 V8 GM Chevy // Mercruiser engine - brand new in box. #51240 Manifolds for your V-6 262 4.3L Mercruiser Brand new in Box. #51220
We have marine engine rebuild kits!! Our specialty is Internal Engine Parts!!!