CMI Marine Headers: CMI Marine 496, 454, 502 E-Top Headers

High Performance Custom Marine Inc CMI 496, 454, 502 E-Top/Uni-Top Style Headers:

West Coast Offshore carries all the CMI 496, 454, 502 E-Top/Uni-Top Style Headers - No Tailpipe Required!

No additional custom tailpipes to buy – these true plug-and-play systems eliminate the need to remove the stock exhaust hoses to install.
These kits introduced CMI’s low-cost satin finish. Classic high polished stainless finish is available for additional charge.
No cast parts to crack; forged and mandrel bent high quality American-made 316L Stainless Steel.
Improved water jacketed protection compared to stock exhaust and seamless water-jacketed header design reduces crack potential.
Same semi-automated high quality welding CMI uses on all racing header applications.
CMI “Cool Collar” flange design eliminates risk of water entering motor by the head flange.
Competitively priced with other aluminum/stainless header systems but with superior performance and extended life span.
Fully post-manufacture annealed to reduce stresses.
Sophisticated engineering leaves stock oil lines in place and only requires relocating the oil filter with a supplied bracket.
Exhaust Water Temperature Bungs are installed as standard equipment.
Gives a racing look to stock engines.
1 7/8” Inside-Diameter primary tubes to get peak horse power and torque.
Works on 34.5” drive centers