Flowmaster 40 Series Delta Flow 2.25" In/Out Offset Chambered Universal Muffler output shaft 2011–2016 GMC Sierra 3500HD 6

2011–2016 GMC Sierra 3500HD 6

JeliBuilt custom tuning takes it to the next level

Optional Adventure Pro Series Upper Control Arms are available for additional strength and performance

Cooler temps

Building Power:

Flowmaster 40 Series Delta Flow 2.25" In/Out Offset Chambered Universal Muffler output shaft 2011–2016 GMC Sierra 3500HD 6This two chamber design incorporates Flowmaster's Delta Flow technology. The Delta deflectors generate increased scavenging for better performance and reduced interior sound. Milder exterior tone and reduced interior resonance over standard 40 series. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability. Features: No internal packing to blowout Race proven Delta Flow technology Excellent Street Strip and Off Road