MERCRUISER COMPLETE EXHAUST MANIFOLD SET GM B-B 58242

Product Description
For Post-1986 Mercruiser GM V8 Big Block
-4 inch elbow
-No spacer

In the V8 GM Big Block, GLM's fully tuned 
design guides exhaust gases directly to 
the riser without turbulance and back pressure.
This increases the engine's performance.
These GLM manifolds also feature an additional 30%
increase in water cooling area that decreases the 
manifold's overall body temperature significantly.

In GLM's Mercruiser replacement 4 inch riser, there are two 
additional water jackets. This allows a higher volume of water 
to flow through the riser, keeping the engine cooler.

All manifolds and risers are powder coated black for maximum corrosion protection

Cast Iron manifolds and risers come with a 3 year warranty

Manufacturer: GLM Products, Inc. 
Mercury Part Number: N/A

International Shipping is available upon request!!!