40 Delta Flow® - 2.00 Offset In / 2.00 Offset Out - Aggressive Sound 1983-pontiac-firebird-esi2278290 1 1/4" wide plates and

1 1/4" wide plates and embossed turbulators which maximize heat transfer while also minimizing pressure drop

or BBC engines featuring aluminum heads/intake will maintain a level stance

Included are 3 removable open-top kangaroo double rifle mag pouches

Feature a 4-ply pleated cotton gauze element that provides excellent filtration

40 Delta Flow® - 2.00 Offset In / 2.00 Offset Out - Aggressive Sound 1983-pontiac-firebird-esi2278290 1 1/4" wide plates andThis 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.