GLM Marine aftermarket exhaust manifold
for GM and Ford 120 - 140 hp. 4 cylinder V6 - V8 engines
GLM Marine aftermarket manifolds are made by " Lost Foam " technology
for precise specification and casting quality. They have hot dipped galvanized coating black painted for corrosion resistance.
GLM fully tuned design to reduce back pressure and enhance flow to add increase engine horse power.
Fully tuned design allows manifold to add 30 - 40% water cooling area for longer life.
In the 4" elbow, there are two extra exits at each side to increase water flushing to avoid
engine over heating.
In V8 GM small block, fully tuned design will guide
exhaust gases directly to elbow without turbulence and back pressure. In the meantime, additional 40% water cooling area will
decrease the entire manifold body temperature significantly.
In V8 GM
big block, extra 30% water cooling area will help reduce temperature in port exit area for longer gasket life. The tuned design
will reduce turbulence and enhance flow for higher and maximum marine engine power.
See our application / compatibility chart to find the right manifold parts for your engine.