CMI 520 E-Top Polished Exhaust System 

CMI 520 E-Top Polished Exhaust Header System

The polished 520 E-top kits offers all the same features as our standard CMI E-Top header. When installed on a Mercury 520 you can expect increases of up to thirty-one horsepower. This are direct replacement headers and will work with the existing exhaust outlets that were installed with your OEM exhaust manifolds. All CMI Elbow Top Systems include rubber water distribution tubes, cooling water bypass couplings installed on the collector elbow, by-pass hose fittings, attaching cap screws, exhaust port gaskets, hose clamps and cooling water inlet fittings needed for most installations. Any Elbow Top System may be purchased with a stainless steel distribution tube upgrade.

• Increases in Horsepower up to 31 HP
• Direct replacement – works with existing exhaust outlets
• Improved mid-range acceleration and torque
• Polished and satin finish available
• Patented “Cool Collar” design
• Mandrel bent and formed from high quality 316L grade stainless steel