Flowmaster American Thunder Crossmember-Back Kit for 67-74 Camaro Firebird Nova For Sale

Flowmaster is proud to introduce our American Thunder dual exhaust system for Camaro, Firebird, and Nova. The system features our exclusive 80 Series Crossflow performance muffler that tucks up high behind the rear differential. Other features include all mandrel-bent dual 2.50-inch head pipes with a built-in H-pipe crossover and dual 2.50-inch tailpipes for a deep rich sound and optimum performance. This Crossmember-Back aluminized steel exhaust system gives these classic muscle cars a moderate tone inside and out. The system includes all parts, hardware and illustrated instructions

• H-Pipe Crossover for Maximum Power and Deep Tone
• Includes Hangers and Hardware for Easy Installation
• Mandrel-Bent 16-Gauge Aluminized Steel Tubing
• Moderate Exterior Exhaust Tone
• Maximum Ground Clearance
• Crossmember-back Proposition 65NoCARB (California) CompliantYesCatalytic Converter IncludedNoCatalytic Converter Quantity0Clamping TypeU-BoltClamps IncludedYesDrive2WDEmission Code5Exhaust SeriesAmerican ThunderExhaust Tip QuantitySold SeparatelyExhaust Tip ShapeRoundExit StyleDual Out RearFinishAluminizedGasket Or Seal IncludedNoGrade TypePerformanceHangers IncludedYesHeat Shield IncludedNoInlet Diameter2.50 INInlet TypeWeld-OnMain Piping Diameter2.50 INMounting Bracket IncludedYesMuffler (Rear) Body Height4.00 INMuffler (Rear) Body Length18.00 INMuffler (Rear) Body Width9.75 INMuffler (Rear) FinishBlack High-Temperature Paint FinishMuffler (Rear) TypeChamberedMuffler Body Length13.00 INMuffler Body MaterialAluminized SteelMuffler Body ShapeOvalMuffler FinishBlack High-Temperature Paint FinishMuffler Flanged InletNoMuffler Flanged OutletNoMuffler IncludedYesMuffler Inlet ConnectionSlip-FitMuffler Inlet Inside Diameter2.50 INMuffler Inlet Outside Diameter2.63 INMuffler Outlet ConnectionSlip-FitMuffler Outlet Quantity1Muffler Part Number42585Muffler Quantity1Muffler Series80 Series CrossflowMuffler TypeChamberedPipe ColorSilverPipe MaterialAluminized SteelSound LevelModerateSpring Bolt Kit IncludedNoTail Pipe Outlet Outside Diameter2.50 INTail Pipe Quantity2Tail Pipe Tapered OutletNoTypeCrossmember-backValve IncludedNoValve TypeNot ApplicableAPPLICATION NOTES
  • Works with Factory manifolds or headers. Connector pipes not included.
  • Does not include manifold downpipes or header reducer cones.
  • Convertible models will require adding 3/8-inch of shims to the stock factory X-brace for clearance or purchasing Hotchkis Performance Convertible brace Part# 1404.
  VEHICLE COMPATIBILITY 1967-1974 Chevrolet Camaro (4.9L V8, 5.3L V8, 5.7L V8, 5L V8, 6.5L V8, 6.6L V8, 7L V8)1967-1974 Pontiac Firebird (5.3L V8, 5.7L V8, 6.6L V8, 7.5L V8)1968-1968 Chevrolet Chevy II (5L V8)1969-1974 Chevrolet Nova (5.7L V8, 5L V8, 6.5L V8, 6.6L V8, 7.4L V8)