SKU: 64347265733

Flowmaster 817940 American Thunder Crossmember-Back Exhaust System

Sale price$459.00 Regular price$510.00
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 15 - Jul 20

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Description

Flowmaster 817940 American Thunder Crossmember-Back Exhaust SystemThis 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

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 complete with a built-in H-pipe crossover for better exhaust scavenging, all mandrel-bent 2.50-inch stainless steel 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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 64347265733

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4.7 ★★★★★
Based on 1390 reviews
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A
Verified Purchase
Amazon Customer
Port Orchard, US
★★★★★ 5
Get The Clumps Out
Nice companion in the Espresso Yard. Watch for the guards, and shiv away at that fresh ground Espresso meat.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 8, 2026
F
Verified Purchase
Fernando Piñero
Lake Worth, US
★★★★★ 5
High quality
Fantastic! especially for the price! Cant be beat it. Does a wonderful job
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Reviewed in the United States on March 1, 2025
J
James D Prather
Phoenix, US
★★★★★ 4
Looks very nice
Sturdy and easy to use.
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Reviewed in the United States on December 21, 2024
C
Verified Purchase
Cassandra Allen
Belleville, US
★★★★★ 5
Wonderful tool
Wonderful tool and works great
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Reviewed in the United States on February 9, 2025
M
Verified Purchase
Mike M
Carnegie, US
★★★★★ 5
Nice upgrade 51mm for me
Color: Silver
This is my second 51mm machine. I never used the included handle or basket… I kept my existing HUGH IMS precision basket and bottomless portafilter. The temp and preinfusion are set and not adjustable but fine (reduced variables). I defeated the shut off by volume by setting higher than needed (wish that was easier to turn off). I like to manually shut off when I hit 30g on my scale. The machine will drip since there is not solenoid valve so I just pull the scale from the try when mouse tail breaks and drip starts. The steam wand and hot water dispenser is a massive upgrade (from Capresso EC50) and the real reason for my upgrade. I would have paid $50-100 more for the improvements listed… but I guess most people would not so this is about the best option for me with 51mm (keeping all the 51mm three lug portafilter stuff I own). 5 stars = for me and the price
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Reviewed in the United States on April 18, 2026

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