Dynatech Vortex Cone Insert Muffler - Slips Into 3" Collectors 421995 and stock A/C vent

and stock A/C vent

1983-2004 Chevrolet S10

1956-1974 Ford Ranch Wagon

Fuel Bladder

1987-1988 Chevrolet R10 Suburban

Dynatech Vortex Cone Insert Muffler - Slips Into 3" Collectors 421995 and stock A/C vent100% T 304 Stainless Steel Construction Compact Size Fits All Racing Applications Ultra Lightweight Less Than 1 2 lb. each Little or No Power Loss Easy Bolt Installation Insert Cones on 3", 3 1 2", 4", 4 1 2", 5" Turn Down with Insert Cone in 3", 3 1 2", 4" How It Works: The Vortex Insert Cone, installed near the exit of the header collector or muffler outlet, provides a large friction area to reflect and dissipate sound energy, thus reducing the dB