Flowmaster 40 Series Delta Flow Muffler - 3" Center Inlet / 2.25" Dual Outlet 600080140 Specially drilled "NASCAR" models are

Specially drilled "NASCAR" models are available for those who wish to safety wire their header bolts to prevent loosening

1999-2000 GMC B7

Torque to 79 ft-lbs

1996-2006 GMC Savana 2500

Flowmaster 40 Series Delta Flow Muffler - 3" Center Inlet / 2.25" Dual Outlet 600080140 Specially drilled "NASCAR" models areThis 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