CMI 496 E-Top Headers Kit - Polished 6" Taller

CMI 13178

CMI 496 E-Top Headers Kit, POLISHED - +6" Taller. Kit includes all parts for 1 engine. Does not use tailpipes, will directly replace current exhaust system! Please measure riser height and call for exact height fitment.

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  • Direct Mercruiser replacement for your 496 Mag or 496 HO 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 horsepower 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 than 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
  • Patented “Cool Collar” design provides a short hot section at the flange, which helps minimize the possibility of water ingestion into the engine.
  • This kit is priced competitively to other aluminum/stainless manifold systems with superior performance and extended lifespan 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 instructions using Mercury supplied engine schematics.
  • Exhaust Water Temperature Bungs Installed as Standard Equipment.


More Information
Model CMI 13178
SKU CMI 13178
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