Description
65 IH/Navistar Truck CO-4000D, COF-4000D COT-4000D – 6-V8
Exhaust Muffler
Mega-Flow Exhaust Muffler
65 IH/Navistar Truck CO-4000D, COF-4000D COT-4000D – 6-V8
Mega-Flow, Aluminized, Universal Fit, Inlet – 5 Center, Outlet – 5 Center
Mega-Flow® performance mufflers combine Walker® quality and engineering with cutting-edge technology, to deliver unparalleled performance and reduce backpressure without sacrificing acoustics. Walker is a “one-stop” convenience, offering complete engine-to-tailpipe coverage of replacement emissions control systems and components for popular domestic, import and commercial vehicle applications.
Manufactured from aluminized steel for durability
Straight-through performance design engineered for class 7 and 8 vehicles
Delivers as much as 30% back-pressure reduction without sacrificing acoustics
Offered in a variety of styles, sizes and materials for your installation needs
4-year/500,000-mile warranty and exclusive 90-Day Safe and Sound Guarantee
Mega-Flow® performance mufflers combine Walker® quality and engineering with cutting-edge technology, to deliver unparalleled performance and reduce backpressure without sacrificing acoustics. Walker is a “one-stop” convenience, offering complete engine-to-tailpipe coverage of replacement emissions control systems and components for popular domestic, import and commercial vehicle applications.
Walker Emissions Control is an industry leading brand of replacement emission control components and systems, including catalytic converters, complete cat-back exhaust systems, mufflers, pipes, resonators and related products for passenger car, light truck and SUVs, and medium - and heavy -duty commercial and specialty vehicle applications.
With more than 100 years of expertise, the Walker brand helps set the standard in the replacement market for product quality, fitment, performance, coverage, technical training, business support and cataloging excellence. 
