Flowmaster American Thunder Exhaust System Features: Mandrel Bent 16ga Aluminized Tubing 3 Year Limited Warranty Moderate Exterior Exhaust Tone Incl Hangers and Hardware For Easy Installation Transmission Cross-Member Back Dual Out Rear Exit Dyno Tuned for Maximum Performance www.Flowmastermufflers.com Height: 12.000 Width: 28.000 Length: 48.000 Weight: 81.00 lbs Vehicle Type: 1 qty Fitment: 1974/Pontiac/Firebird/Trans Am/5.7L 5737CC 350Cu. In. V8 GAS OHV Naturally Aspirated::Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~ Does Not Fit Convertibles w/o X-Brace Modification~ Call Tech Support Line For Assistance^^1974/Pontiac/Firebird/Trans Am/5.7L 5733CC 350Cu. In. V8 GAS OHV Naturally Aspirated::Convertibles Require Aftermarket X-Brace Or 3/8 in. Shims For Clearance~ Does Not Fit Convertibles w/o X-Brace Modification~...