Pro Series Muffler - 4.00 Center In / 4.00 Center Out - Moderate Sound WOMANS Recommendation Disclaimer: Replace with a

Recommendation Disclaimer: Replace with a new copper washer after each service

our kit gives you the option of massive dual inlet airflow

stock remanufactured replacement

0L diesel engine with enough fuel for up to 600 HP with multiple fueling System upgrades

Quick and Easy Bolt-On Installation: Designed with convenience in mind

Pro Series Muffler - 4.00 Center In / 4.00 Center Out - Moderate Sound WOMANS Recommendation Disclaimer: Replace with aThe Pro Series mufflers work on all applications ranging from street trucks, diesel pullers and RV pushers to every class of racing on dirt or asphalt. During development, at the dyno and track, the Pro Series mufflers consistently delivered performance that is equal to or surpasses open pipe systems, while dramatically reducing sound levels across the RPM range.