Flowmaster
Flowmaster 64-67 GM A-BODY 3in. American Thunder SS Crossmember-Back Exhaust System
Why this price?
$1,299.95 is MSRP, the lowest price Flowmaster lets us list it at. Additionally, Pro members get $142.99 back on this part.
$1,299.95 − $142.99 = $1,156.96
Special Order
This part is still available to order. Once you place your order, we’ll submit it directly to Flowmaster, and they’ll ship it straight to you.
Delivery times can vary depending on the brand, so we can’t guarantee an exact arrival date. What we can guarantee is that we’ll stay on top of your order, monitor its progress, and keep you updated until it reaches your door.
Special-order items are typically not kept in stock by most retailers. By ordering through us, your order is placed directly with Flowmaster, assuring you get the part as quickly as possible.
Want to get an estimated delivery timeframe before ordering? Contact us through our contact page, and we’ll be happy to find out for you.
Not sure it fits? Read our tips.
Fitment tips
Fitment can come down to more than year, make and model. Sometimes the sub-model decides, so start with the fitment table below.
- Drive type. If your car is all-wheel drive, make sure the part is for all-wheel drive, not rear-wheel drive.
- Engine size. For engine parts, make sure the engine size on the product matches your engine.
- Transmission. Manual and automatic cars often take different parts.
- Body style. Sedan or hatch, two-door or four-door, cab and bed length on trucks.
Manufacturer data can sometimes have imperfections. Still not sure? We are happy to help.
Send us a message and we will confirm the fit.
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The American Thunder® Crossmember-Back exhaust system is a true dual large 3.00-inch muscle car system for the person who is looking for a deep aggressive sound for their high horsepower vehicle. This stainless steel system is mandrel-bent for maximum performance, includes an H-pipe crossover to balance out the exhaust pressures, add hp and torque, and to help eliminate back-rap on deceleration. The specially selected Super 40® Series performance mufflers feature a large case to handle the added horsepower and provide a deep muscular tone flowing through the large 3.00-inch tailpipes. The American Thunder systems generally deliver an aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The sound level will depend greatly on the engine and level of modifications. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation. Covered by our Lifetime Limited Warranty.
- Large 3.00-inch Exhaust System for High Horsepower Engines
- H-pipe Crossover for Maximum Power and Deep Tone
- Super 40 Series Mufflers for Deep Powerful Sound
- Includes Hangers and Hardware for Installation
- Mandrel-bent 16-gauge Stainless Steel Tubing
- Crossmember-Back True Dual Exhaust System
- Aggressive Exterior Exhaust Tone
- Lifetime Limited Warranty
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1965-1967 | Buick | Gran Sport | Base |
| 1964-1967 | Buick | Skylark | Base |
| 1964-1967 | Buick | Special | Base |
| 1964-1967 | Buick | Special | Deluxe |
| 1964-1967 | Buick | Sportwagon | Base |
| 1966 | Buick | Sportwagon | Custom |
| 1964-1967 | Chevrolet | Chevelle | 300 |
| 1965-1967 | Chevrolet | Chevelle | 300 Deluxe |
| 1967 | Chevrolet | Chevelle | Concours |
| 1964-1967 | Chevrolet | Chevelle | Malibu |
| 1964-1965 | Chevrolet | Chevelle | Malibu Super Sport |
| 1967 | Chevrolet | Chevelle | SS 396 |
| 1966 | Chevrolet | Chevelle | Super Sport 396 |
| 1964-1967 | Chevrolet | El Camino | Base |
| 1964-1967 | Oldsmobile | 442 | Base |
| 1964-1967 | Oldsmobile | Cutlass | Base |
| 1964-1967 | Oldsmobile | Cutlass | Holiday |
| 1967 | Oldsmobile | Cutlass | Turnpike Cruiser |
| 1967 | Oldsmobile | Cutlass Supreme | Base |
| 1964-1967 | Oldsmobile | F85 | Base |
| 1964-1966 | Oldsmobile | F85 | Deluxe |
| 1966 | Oldsmobile | F85 | Holiday |
| 1964-1967 | Oldsmobile | Vista Cruiser | Base |
| 1964-1967 | Oldsmobile | Vista Cruiser | Custom |
| 1964-1967 | Pontiac | GTO | Base |
| 1964-1967 | Pontiac | LeMans | Base |
| 1964-1967 | Pontiac | Tempest | Base |
| 1964-1965,1967 | Pontiac | Tempest | Custom |
| 1964-1967 | Pontiac | Tempest | Safari |
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