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The Straight Flow Performance Stack Mufflers cancel out sound waves by directing them into one another causing destructive interference for a low restriction, quiet exhaust. This is the most economic-performance addition you can add to your truck. The Straight Flow Muffler will lower exhaust temperatures, to increase fuel mileage, improve throttle response, and gain up to 50 additional horsepower.

5″ inlet, 5″ outlet, 10″ diameter, 51″ long

For more information about our Performance Mufflers, or for help with any of your performance needs, contact your nearest PDI dealer or call PDI at 800-511-1231.

Available for All Class 8 Trucks with 5″ Vertical Stacks

Stack Muffler

Call Us to Order: 800-511-1231

NOT Approved for Sale or Installation in the State of California

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