CMI 454/502 E-TOP Headers - Satin Kit

$3,525.00
SKU
CMI 13186

This is a direct Mercruiser replacement for your 454/502 engine.

No additional custom tails to buy. You don't need to remove your stock exhaust hose to install our kit, a true plug and play system.
This new kit introduces CMI's new low cost satin finish. For an additional charge you can have our classic high polished stainless finish.
1 7/8" id primary to get peak horse power and torque.
Mandrel bent and formed from High quality 316L grade material.
Fully post annealed to reduce stresses built up in the header during the manufacturing process
The only seamless water jacketed header manufactured. No welded inner primaries or water jacketed tubes to crack and leak.
More water jacketed protection then your stock exhaust.
Approved by Mercruiser to not void warranty on the motor, with the exception of water reversion.
Same high quality semi automated welding as used on all racing applications
Cool collar patented flange design to eliminate the risk of getting water in the motor by the head flange
This kit is Price competitive to other aluminum/stainless manifold systems with superior performance and extended life span in harsh marine environments.
No cast parts to crack, all CMI collectors are forged from American made stainless steel.
Works on 34.5" drive centers

Brings a race look to your stock engine.
Sophisticated engineering leaves your stock oil lines in place and only requires relocating your oil filter with a supplied bracket.
Step by step, do it yourself insulation instructions using Merc supplied engine schemadics.

Exhaust Water Temperature Bungs Installed as Standard Equipment.

Prop65 Warning Icon

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

This is a direct Mercruiser replacement for your 454/502 engine.

No additional custom tails to buy. You don't need to remove your stock exhaust hose to install our kit, a true plug and play system.
This new kit introduces CMI's new low-cost satin finish. For an additional charge, you can have our classic high polished stainless finish.
1 7/8" id is primary to get peak horse power and torque.
Mandrel bent and formed from the High quality 316L grade material.
Fully post annealed to reduce stresses built up in the header during the manufacturing process
The only seamless water jacketed header manufactured. No welded inner primaries or water jacketed tubes to crack and leak.
More water jacketed protection then your stock exhaust.
Approved by Mercruiser to not void warranty on the motor, with the exception of water reversion.
Same high-quality semi-automated welding as used in all racing applications
Cool collar patented flange design to eliminate the risk of getting water in the motor by the head flange
This kit is Price competitive to other aluminum/stainless manifold systems with superior performance and extended life span in harsh marine environments.
No cast parts to crack, all CMI collectors are forged from American made stainless steel.
Works on 34.5" drive centers
Brings a race look to your stock engine.
Sophisticated engineering leaves your stock oil lines in place and only requires relocating your oil filter with a supplied bracket.
Step by step, do it yourself insulation instructions using Merc supplied engine schematics.
Exhaust Water Temperature Bungs Installed as Standard Equipment.

More Information
Model CMI 13186
SKU CMI 13186
Manufacturer CUSTOM MARINE INC
Face Color N/A
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