Straight flow mufflers cancel out soundwaves by directing them into one another to absorb sound energy without added restriction. Up to 50 additional horsepower, improved throttle response and lower exhaust gas temperatures. Improves fuel mileage and power. 51.5" total length x 10" diameter. Designed to go up the side or rear of the cab. This muffler creates no back pressure, which allows for a gain of at least 1/4 mile per gallon. You can save 1000 gallons for every 100,000 miles driven. Since the flow is not restricted, the muffler gathers no soot or condensation, making this muffler last for the life of the truck. 5" I.D. inlet and outlet. Fits all class 8 trucks with 5" vertical stacks.
NOTE: The end with the shorter piece of perforated tube is the top. Muffler should be stamped "inlet".
Not intended to function horizontally under cab. Do not install under cab. Not intended for use with DPF systems.