Flowmaster 67-72 GM Truck 4WD American Thunder Crossmember-Back Exhaust System

This Flowmaster American Thunder dual exhaust system is specifically designed for 1967-1972 Chevrolet and GMC K10, K15/K1500, K20, and K25/K2500 4wd trucks with V8 engines. The system is perfect for the person looking for an aggressive to moderate interior and exterior sound level. Starting at the Crossmember-Back, the exhaust comes complete with a built-in H-pipe crossover for better exhaust scavenging, all mandrel-bent 2.50-inch stainless steel tubing, a pair of Super 44 Series performance mufflers, and your choice of three tailpipe exits (Turndown behind rear tires, side exit behind rear tires, or straight out the back under the bumper). The system includes all hardware necessary for installation and is covered by our Lifetime Limited Warranty. Fits both short and long wheelbase trucks.

• Crossmember-Back Design Works with Stock Manifolds or Headers, Allowing More Application Options
• Three Different Tailpipe Exit Options Allow You to Tailor the Look of the Kit to Your Style
• Super 44 Mufflers Deliver Increased Performance and an Aggressive to Moderate Sound Level
• Mandrel-Bent Pipes Help to Maximize the Exhaust Flow for Better Performance
• 16-Gauge, 2.50-Inch 409 Stainless Steel Pipes add Durability and Strength
• H-Pipe Style Crossover Helps Exhaust Gas Scavenging and Reduces Drone
• Includes Hangers and Hardware for Installation
• Lifetime Limited Warranty

Vehicle Fitment

• 1967-1972 Chevrolet K10 Pickup
• 1967-1972 Chevrolet K20 Pickup
• 1967-1972 GMC K15/K1500 Pickup
• 1967-1972 GMC K25/K2500 Pickup

Please verify exact fitment for your trim and engine before ordering.

🚚 Vendor Direct Shipment: This item is not stocked in our warehouse and ships directly from the manufacturer. Please allow additional handling time before dispatch.

Manufacturer Part Number: 817940

Images are for illustrative purposes only. Actual product may vary.

⚠ WARNING (California Proposition 65): This product can expose you to chemicals which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.