4" inch diesel straight through performance Diesel exhaust mufflers constructed with 409 stainless steel, our universal exhaust mufflers designed to allow for maximum free flow—and horsepower. Whether you have a true dual exhaust system or not, our mufflers will make you master the flow & the sound of your exhaust system giving you the max dyno results. Our universal muffler replacement with a straight through design, resonators and glasspacks & can be a great addition to your on road super custom project. mufflers feature a straight through, perforated 409 stainless steel core wrapped with stainless steel mesh acoustic material, making it the ideal mufflers for your next custom exhaust project, allowing for a free flow through the exhaust pipes with very little restriction.

• Constructed from Heavy Gauge "Approx. ±16" 409 Stainless Steel, With internal fill of Stainless Steel Mesh wrap around the perforated core pipe and a thick layer of cut to size fiber glass sheet of top of it For Perfect Sound Tuning.

• State of the art - TOP NOTCH - TIG welded for long life.

• Perfect for any custom exhaust project or muffler upgrade.

• Free flow muffler, straight through perforated stainless steel core wrapped with stainless steel mesh & sound absorbing materials to enhances sound, exhaust flow & improves performance.

• We take pride in our work and products, Top Notch Craftsmanship that is compared to NO ONE in the industry. 

• Perfect for any custom exhaust project or muffler upgrade.

• Fully TIG Welded Case.

*ID = Inner Diameter