Super 40 - 2.50 Center In / 2.50 Center Out - Aggressive Sound 1998-pontiac-firebird-esi4271216 These BBK Mass Air flow

These BBK Mass Air flow sensors offer a large increase in air flow over stock and can add up to an additional 15 rear wheel horsepower depending on other modifications

11/32" hose barb inlets and complete hardware kit included

Since the polyurethane bushings are softer they are designed to absorb more road noise and shock before it enters the passenger compartment of the vehicle

making joining two pieces of hose as easy as pushing them together

Then adjust your shock valving with the twist of a knob to firm up or soften the ride

Super 40 - 2.50 Center In / 2.50 Center Out - Aggressive Sound 1998-pontiac-firebird-esi4271216 These BBK Mass Air flowDeveloped from our Top Ten race muffler lineup for use on the street strip, the Super 40 features Flowmaster's Delta Flow technology. It's larger case profile provides the best of both worlds of performance and sound, especially on forced induction and high horsepower vehicles. The Super 40 has that deep powerful sound of the Original 40 series but with all the benefits of performance and low interior resonance from the Delta Flow technology.