Description
Overview
The Flowmaster American Thunder Crossmember-Back Exhaust System is a complete bolt-on upgrade engineered for the 1962-1967 Chevrolet Chevy II/Nova. Part of Flowmaster’s respected American Thunder series, this system is built for the driver who wants an unmistakable, aggressive presence both inside and outside the car, paired with the real performance benefits Flowmaster is known for. Everything downstream of the crossmember is covered, giving your classic Nova a purposeful sound and a clean, finished look under the rear.
At the heart of the kit are stainless steel Super 44 Series mufflers, prized for their deep, aggressive-to-moderate tone that comes alive under throttle without droning on the highway. Paired with mandrel-bent tubing, the Super 44s deliver a bold voice while keeping exhaust flow smooth and efficient.
Key Benefits
Flowmaster mandrel-bends all of the pipes to reduce restriction and maximize performance, so exhaust gases exit freely instead of fighting through crushed bends. The system runs dual 2.50″ 409S stainless steel tailpipes with a welded H-Pipe that helps balance exhaust pulses between banks for improved scavenging and a rich, refined note. This is a Dual Out Side Exit configuration, routing the tailpipes to exit at the sides for that classic muscle-car stance and sound.
- Crossmember-back design engineered specifically for the 1962-1967 Chevy II/Nova (2WD)
- Stainless steel Super 44 Series mufflers for an aggressive yet streetable tone
- Dual 2.50″ 409S stainless steel tailpipes with a welded H-Pipe
- Mandrel-bent pipes to reduce restriction and maximize flow
- Silver pipe finish with embossed-logo tips and flanged mount connections
- Dual side-exit routing (Dual Out Side) for a true muscle-car look and sound
- CARB (California) compliant, Emission Code 5
Fitment & Installation
This system is designed as a direct, easy-fitting bolt-on for the 1962-1967 Chevrolet Chevy II/Nova in 2WD applications. It includes all necessary parts and hardware for installation, with flanged connections that make assembly straightforward. Muffler part number is listed as Kit Only, and the mufflers are included with the system; a heat shield is not included. Note the California Proposition 65 warning associated with this product.
Sound & Character
If you want your Nova to announce itself, the American Thunder Super 44 combination delivers. Expect an aggressive tone that stays engaging around town and under acceleration, with a moderate character that keeps it livable for daily and weekend driving alike. The embossed-tip styling and silver finish round out a package that looks as good as it sounds.
Backed by Flowmaster’s Lifetime Limited Warranty, this crossmember-back system is a confident, all-in-one exhaust upgrade for owners who want their early Chevy II/Nova to breathe better and sound the part.
