Flowmaster 40 Series Delta Flow Muffler - 2" Offset - Inlet / Center Outlet 767001 4L80E and 4L85E automatic transmissions

4L80E and 4L85E automatic transmissions with a PRNDL switch

2017-2018 GMC Sierra 1500 69

C25 Suburban 1978-1975

1984-1992 GMC C1500 Suburban

Although some front end lift is beneficial to weight transfer

Flowmaster 40 Series Delta Flow Muffler - 2" Offset - Inlet / Center Outlet 767001 4L80E and 4L85E automatic transmissionsThis two chamber design incorporates Flowmaster's patented Delta Flow technology. The Delta deflectors generate increased scavenging for better performance and reduced interior sound. Milder exterior tone and reduced interior resonance over Original 40 series. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability. Features: Durable Fully Welded 16 Gauge Aluminized Steel 3 Year Limited Warranty Aggressive To Moderate