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Other products by CMI
Item #: 13176
Reg. Price: USD $6,023.00
Our Price: USD $4,799.00


At Last a CMI header that does not require tail pipes. The new 496 E-Top header is a one piece header built to the same exacting standards as the rest of CMI's awesome line-up. These headers are a true plug and play system to replace your stock manifolds on 496's, 496 H.O.'s, 454's, 502,'s and most other big block Chev applications. Call today for full details on this exciting new product.

Warning: Installing these headers on your boat may require the purchase of a higher pitched prop.


  • No additional custom tails to buy. No need to remove the stock exhaust hose to install this kit – a true plug and play system.
  • This new kit introduces CMI’s new low cost satin finish. For an additional charge, a classic high polished stainless finish is available.
  • 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 than stock exhaust.
  • 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 with 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 stock engines.
  • Sophisticated engineering leaves stock oil lines in place and only requires relocating the oil filter with a supplied bracket.
  • Step by step, do-it-yourself instructions using Mercury supplied engine schematics are included.
  • Exhaust Water Temperature Bungs are installed as standard equipment.
  • •Model: CMI 13175
  • •Shipping Weight: 75lbs


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