Flowmaster 40 Series Delta Flow 3" Center In 2.5" Dual Out Universal Muffler 2015-2016 6.7l powerstroke When to use the Box

When to use the Box Plug

re-indexed torsion bar keys for proper lift height

Over 350% temperature drop versus the factory system

Multiple Configuration Options

Flowmaster 40 Series Delta Flow 3" Center In 2.5" Dual Out Universal Muffler 2015-2016 6.7l powerstroke When to use the BoxThis 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