This American Thunder Crossmember-Back exhaust system is custom designed for most 1964-1972 GM A-body cars and is for the person looking for a complete 2.50-inch dual exhaust system with a moderately aggressive exterior tone and a moderate interior sound. With easy fit in mind, these aluminized steel systems feature all mandrel-bent tubing, an H-pipe to equalize the exhaust pressures for maximum performance and deep sound and includes a pair of specially selected Super 40 mufflers.

The mandrel-bent 2.50-inch tailpipes tuck up out of the way for maximum clearance and offer you two choices of tailpipe exit styles. Like all Flowmaster systems, benefits include improved throttle response, power, and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for an easy installation and is covered by our 3-year Limited Warranty.

• Fits most 1964-1972 GM A-Bodies with V8 engines and aftermarket long tube headers
• Includes Hangers and Hardware for Easy Installation
• Mandrel-bent 16-Gauge Aluminized Steel Tubing
• Two Exit Style Choices: Slash Cut or Turndown
• Moderate to Aggressive Exterior Exhaust Tone
• Built-in Balance Pipe Equalizes Pressures
• Super 40 Series Performance Mufflers
• Flowmaster Quality & Reliability
• Crossmember-Back System