GLM

58245

MERCRUISER COMPLETE EXHAUST MANIFOLD SET GM B-B (CAST IRON) | GLM Part Number: 58245

Intake Manifold

GLM Part Number: 58245

For Pre-1986 Mercruiser GM V8 Big Block -3 inch elbow -6 inch 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. *All manifolds and risers are powdercoated black for maximum corrosion protection* **Cast Iron manifolds and risers come with a 3 year warranty**

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