ISR Performance Universal Exhaust Silencer - 4"

Big 4 inch exhaust tips look the part, but a wide-open outlet moves a lot of sound. The ISR Performance Universal Exhaust Silencer in the 4 inch size is a removable insert that lets you dial back the volume of a loud system on demand and restore the full note whenever you want it. This is the larger of the two ISR silencers and is meant for 4 inch tips and muffler outlets.

Why run a silencer

• Pass sound checks at tracks with decibel limits
• Reduce drone and rasp on long drives
• Keep an aggressive exhaust on the car while staying on good terms with the people around you
• Remove it in minutes when you want the unrestricted sound back

Compatibility

Universal fit, sized for 4 inch exhaust outlets. It is not vehicle specific, so it can move from one car to the next as your builds change. If your exhaust runs 3 inch tips, use the 3 inch ISR silencer instead.

Before ordering

Check the inside diameter of your tip with calipers. Nominal 4 inch tips vary slightly between manufacturers depending on wall thickness, and the silencer needs a snug fit to stay put and do its job.

All ISR Performance products are designed for off-road use only.