Pay in installments of $106.25 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 15 - Jul 20
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Exhaust System American Thunder 64"-72" GM Chevelle El Camino GTOOverview: 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
Overview:
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.
Features:
Specs:
Applications:
- 1970-1972 Buick GS 350 CID
- 1968-1969 Buick GS 350 350 CID
- 1968-1969 Buick GS 400 400 CID
- 1970-1972 Buick GS 455 455 CID
- 1965-1966 Buick Gran Sport 401 CID
- 1967-1967 Buick Gran Sport 340 CID
- 1967-1967 Buick Gran Sport 400 CID
- 1964-1967 Buick Skylark 300 CID
- 1965-1966 Buick Skylark 401 CID
- 1966-1967 Buick Skylark 340 CID
- 1967-1968 Buick Skylark 400 CID
- 1968-1972 Buick Skylark 350 CID
- 1970-1971 Buick Skylark 455 CID
- 1964-1967 Buick Special 300 CID
- 1966-1967 Buick Special 340 CID
- 1968-1969 Buick Special 350 CID
- 1964-1965 Buick Sportwagon 300 CID
- 1966-1967 Buick Sportwagon 340 CID
- 1968-1969 Buick Sportwagon 350 CID
- 1968-1969 Buick Sportwagon 400 CID
- 1964-1968 Chevrolet Chevelle 327 CID
- 1964-1967 Chevrolet Chevelle 283 CID
- 1965-1969 Chevrolet Chevelle 396 CID
- 1968-1972 Chevrolet Chevelle 307 CID
- 1969-1972 Chevrolet Chevelle 350 CID
- 1970-1972 Chevrolet Chevelle 402 CID
- 1970-1972 Chevrolet Chevelle 454 CID
- 1964-1969 Chevrolet El Camino 327 CID
- 1964-1967 Chevrolet El Camino 283 CID
- 1966-1970 Chevrolet El Camino 396 CID
- 1968-1972 Chevrolet El Camino 307 CID
- 1968-1972 Chevrolet El Camino 350 CID
- 1970-1972 Chevrolet El Camino 400 CID
- 1970-1972 Chevrolet El Camino 402 CID
- 1970-1972 Chevrolet El Camino 454 CID
- 1970-1972 Chevrolet Monte Carlo 350 CID
- 1970-1972 Chevrolet Monte Carlo 400 CID
- 1970-1972 Chevrolet Monte Carlo 402 CID
- 1970-1972 Chevrolet Monte Carlo 454 CID
- 1971-1972 GMC Sprint 307 CID
- 1971-1972 GMC Sprint 350 CID
- 1971-1972 GMC Sprint 402 CID
- 1971-1972 GMC Sprint 400 CID
- 1971-1972 GMC Sprint 454 CID
- 1964-1964 Oldsmobile 442 330 CID
- 1965-1969 Oldsmobile 442 400 CID
- 1968-1971 Oldsmobile 442 455 CID
- 1964-1967 Oldsmobile F85 330 CID
- 1965-1966 Oldsmobile F85 400 CID
- 1968-1972 Oldsmobile F85 350 CID
- 1970-1972 Oldsmobile F85 455 CID
- 1964-1967 Oldsmobile Cutlass 330 CID
- 1965-1968 Oldsmobile Cutlass 400 CID
- 1968-1972 Oldsmobile Cutlass 350 CID
- 1970-1972 Oldsmobile Cutlass 455 CID
- 1967-1967 Oldsmobile Cutlass Supreme 330 CID
- 1968-1972 Oldsmobile Cutlass Supreme 350 CID
- 1971-1972 Oldsmobile Cutlass Supreme 455 CID
- 1964-1967 Oldsmobile Vista Cruiser 330 CID
- 1968-1972 Oldsmobile Vista Cruiser 350 CID
- 1968-1969 Oldsmobile Vista Cruiser 400 CID
- 1970-1972 Oldsmobile Vista Cruiser 455 CID
- 1964-1966 Pontiac GTO 389 CID
- 1967-1972 Pontiac GTO 400 CID
- 1970-1972 Pontiac GTO 455 CID
- 1964-1967 Pontiac Beaumont 283 CID
- 1964-1967 Pontiac Beaumont 327 CID
- 1965-1967 Pontiac Beaumont 396 CID
- 1968-1972 Pontiac Grand Prix 400 CID
- 1968-1969 Pontiac Grand Prix 428 CID
- 1970-1972 Pontiac Grand Prix 455 CID
- 1964-1967 Pontiac LeMans 326 CID
- 1968-1972 Pontiac LeMans 350 CID
- 1968-1972 Pontiac LeMans 400 CID
- 1970-1972 Pontiac LeMans 455 CID
- 1964-1967 Pontiac Tempest 326 CID
- 1968-1970 Pontiac Tempest 350 CID
- 1968-1970 Pontiac Tempest 400 CID
Emissions:
- This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 14 reviews
Sort
Product Reviews
★★★★★ 5
Excellent product high quality.
Size: 36 sqft, Size: 36 sqft
This stuff definitely suprised how easy it was to work with.
Not to mention it sticks very well. Don't put it on anything you may need to get back into. It will take the paint off of a service area. I have a 2018 dodge durango. I just had a aftermarket audio sytem installed. It was rattling so bad it was driving me crazy. I seen this stuff and decided to give it a try.
Its a night and day difference no moore rattling. I box will be enough to do my back gate and all front and rear doors also. For the price you honestly can not beat it. If your on the fence about trying it don't be. You definitely won't regret getting it. Its worth every penny. You don't realize how much something rattling in your vehicle robs you of spund quality. Glad I made the decision. Now off to the other 4 doors. ,and then the roof. One of the things I really like was the fact it has multiple line to help you make even better cuts. Definitely will buy a gen.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 28, 2026
★★★★★ 5
Affordable, Clean and does the job.
Size: 36 sqft, Size: 36 sqft
I consumed about 90% of this box doing all doors and the tailgate on a 2000 tahoe. I applied it very liberally inside every door (exteror) panel. We then added an almost equal amount of deadening/absorbing/decoupling foam to the other side of the door (panel side). If you know how many rattles a circa 2000 tahoe GMT800 can have by now, you can appreciate why I added this as a "must" if i were to put some money back into this vehicle. Best sub $150 spent on this mini resto so far, right next to tint.
Good quality. Not to thick or thin. Good sized sheets. Seamed to deaden as good as another slightly thicker material i recently used in my F250. My box was delivered with no issues of melting or anything funky. Clean, no major smell before or after and easy to work with. Maybe buy a roller set and wear gloves. Save your hands if your doing inside of panels. Good buy. Will buy more for future projects.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026
★★★★★ 5
Great product
Size: 36 sqft
Easy to apply, made a big difference in sound deadening on side by side. Would definitely purchase again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
★★★★★ 5
AS GOOD AS ANY OTHER, WORKS GREAT
Size: 36 sqft, Size: 36 sqft
Used this in my 17 RAM 1500. This stuff works great, just as good as S...ss brand that is also sold on here. Same thickness and same tackiness. And this stuff sticks like crazy, once its laid down and rolled onto the surface, it is hard to remove, so I am pretty sure it will stay where I installed it. It is great value, one box was enough to do the whole roof of the truck with a little left over for small spots. I think it took a total of 2.5 boxes to do my whole crew cab, roof, floor and back wall and most of the firewall, and I also added a layer of their .25" foam. I do notice a difference in less outside noise, from wind and road. I will be doing my wife car soon, and this is the product I will be using again, I recommend this.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 14, 2026
★★★★★ 5
Dyna... who?
Size: 36 sqft
This stuff works great. Fraction of the cost to Dyna.. and just as good. Very sticky. Used in doors, floors and ceiling. Great product and performs flawlessly. I would highly recommend this.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 13, 2026