350 Chevy Indmar Replacement Exhaust Manifolds, 3-1/2" Hose 

350 Chevy Indmar Replacement Exhaust Manifolds, 3-1/2" Hose

• Polished finished
• Zinc anode (replaceable)
• Approx. 1/4 the weight of cast manifolds
• Smooth even flow of cooling water to all surfaces
• Replaces Stock OEM Exhaust systems
• Standard replacement exact fittings and higher than standard eg. 3", 6" 12" etc. manifolds
• One piece design eliminates the possibility of gasket failure resulting in engine failure
• Only one water inlet reduces the chances of leaking
• 5 Year Limited Warranty

Hi-Tek vs Indmar (350 Chevy)
260 HP Mercruiser Dyno Test
260 Mercruiser Test Dyno Report

1. Water mixes with exhaust gases
2. Extractor design for cylinder scavenging for maximum efficiency
3. One piece design eliminates the possibility of gasket failure resulting in engine failure
4. Only one water inlet reduces the chances of leaking
5. Anode prevents electrolysis