Menu
800-227-2242
My Garage Add a vehicle

Recent vehicles

Vehicles you shop for show up here. Pick one in the Shop By Vehicle bar below.

Cart
Reset
American Thunder Crossmember-Back Exhaust System

Flowmaster American Thunder Crossmember-Back Exhaust System

Mfg Part #
817200
NP#
FLO817200
Brand
Flowmaster
Fitment Note
Aggressive sound; Super 40 Series Performance Mufflers; 3.00-inch Stainless Steel Pipes; Small Block Chevy Swap; Big Block Chevy Swap; LS Swap; LT Swap.

Fits 1968 to 1972 Buick GS, GS 350, GS 400 and 4 more models, and 4 more makes. See every vehicle

  • Super 40 Series Performance Mufflers for Deep Powerful Sound
  • H-pipe Crossover for Maximum Power and Deep Tone
  • Mandrel-bent 16-gauge Stainless Steel Tubing
  • Includes Hangers and Hardware for Installation
  • Crossmember-Back True Dual Exhaust System
  • Large 3.00-inch Stainless Steel Tubing
  • Does Not Include Header Reducers or Factory Manifold Downpipes
  • Aggressive Exterior Exhaust Tone
  • Lifetime Limited Warranty
$1,819.93 CAD Free shipping in Canada, ships today
Free shipping in Canada, ships todayFree shipping in Canada
Availability: This product is in our Burlington warehouse.
Book installation at our Service Centre

Does this fit your vehicle?

Description

This Crossmember-Back American Thunder system is custom designed for high horsepower and large cubic inch engines in 1968-1972 GM A-Bodies with a V8 engine. It's a true-dual exhaust system featuring all mandrel-bent 3.00-inch stainless steel tubing with a built-in H-pipe crossover assembly flowing into a pair of large cased Super 40 Series performance mufflers for maximum power and a deep powerful aggressive exhaust note. The large 3.00-inch mandrel-bent tailpipes are custom bent to tuck up high above the rear end and exit with a slight turn down under the rear bumper. The system is constructed from 409 stainless steel for maximum durability, includes all necessary hardware and hangers for installation and is covered by our Lifetime Limited Warranty. This system is also available in Aluminized steel and comes with a 3-year Limited Warranty, check out part# 17200.

Warranty: Manufacturer's Limited Lifetime Warranty

Fits these vehicles

YearMakeModelSubmodelEngine
1970 - 1972BuickGSBase5.7L 350 V8
1968 - 1969BuickGS 350Base5.7L 350 V8
1968 - 1969BuickGS 400Base6.6L 400 V8
1970BuickGS 455Base, GSX7.5L 455 V8
1971 - 1972BuickGS 455Base7.5L 455 V8
1968BuickSkylarkBase, Custom5.7L 350 V8, 6.6L 400 V8
1969BuickSkylarkBase, Custom5.7L 350 V8
1970BuickSkylark350, Base, Custom5.7L 350 V8, 7.5L 455 V8
1971BuickSkylarkBase, Custom5.7L 350 V8, 7.5L 455 V8
1972BuickSkylark350, Base, Custom5.7L 350 V8
1968 - 1969BuickSpecialBase5.7L 350 V8
1968 - 1969BuickSportwagonBase, Custom5.7L 350 V8, 6.6L 400 V8
1970BuickSportwagonBase5.7L 350 V8, 7.5L 455 V8
1971 - 1972BuickSportwagonBase5.7L 350 V8
1968ChevroletChevelle300, 300 Deluxe, Concours, Malibu, Nomad, Nomad Custom, SS 3965.0L 307 V8, 5.3L 327 V8, 6.5L 396 V8
1969ChevroletChevelle300 Deluxe, Concours, Concours Estate, Greenbrier, Malibu, Nomad, SS 3965.0L 307 V8, 5.7L 350 V8, 6.5L 396 V8
1970ChevroletChevelleBase, Concours, Concours Estate, Greenbrier, Malibu, Nomad, SS 396, SS 4545.0L 307 V8, 5.7L 350 V8, 6.6L 402 V8, 7.4L 454 V8
1971 - 1972ChevroletChevelleBase, Concours, Concours Estate, Greenbrier, Heavy Chevy, Malibu, Nomad, SS5.0L 307 V8, 5.7L 350 V8, 6.6L 402 V8, 7.4L 454 V8
1968ChevroletEl CaminoBase, Custom, SS5.0L 307 V8, 5.3L 327 V8, 5.4L 327 V8, 5.7L 350 V8, 6.5L 396 V8
1969ChevroletEl CaminoBase, Custom, SS5.0L 307 V8, 5.3L 327 V8, 5.7L 350 V8, 6.5L 396 V8
1970ChevroletEl CaminoBase, Custom, SS5.0L 307 V8, 5.7L 350 V8, 6.5L 396 V8, 6.6L 400 V8, 6.6L 402 V8, 7.4L 454 V8
1971 - 1972ChevroletEl CaminoBase, Custom, SS5.0L 307 V8, 5.7L 350 V8, 6.6L 400 V8, 6.6L 402 V8, 7.4L 454 V8
1970 - 1972ChevroletMonte CarloBase5.7L 350 V8, 6.6L 400 V8, 6.6L 402 V8, 7.4L 454 V8
1971GMCSprintBase5.0L 307 V8, 5.7L 350 V8, 6.6L 400 V8, 6.6L 402 V8, 7.4L 454 V8
1972GMCSprintBase, Custom5.0L 307 V8, 5.7L 350 V8, 6.6L 400 V8, 6.6L 402 V8, 7.4L 454 V8
1968 - 1969Oldsmobile442Base6.6L 400 V8, 7.5L 455 V8
1970 - 1971Oldsmobile442Base7.5L 455 V8
1968OldsmobileCutlassBase, S5.7L 350 V8, 6.6L 400 V8
1969OldsmobileCutlassBase5.7L 350 V8
1970OldsmobileCutlassBase5.7L 350 V8, 7.5L 455 V8
1971OldsmobileCutlassBase, S5.7L 350 V8, 7.5L 455 V8
1972OldsmobileCutlassBase, Cruiser, S5.7L 350 V8, 7.5L 455 V8
1968 - 1970OldsmobileCutlass SupremeBase5.7L 350 V8
1971 - 1972OldsmobileCutlass SupremeBase5.7L 350 V8, 7.5L 455 V8
1968 - 1969OldsmobileF85Base5.7L 350 V8
1970OldsmobileF85Base5.7L 350 V8, 7.5L 455 V8
1971OldsmobileF85Base5.7L 350 V8
1972OldsmobileF85Base5.7L 350 V8, 7.5L 455 V8
1968 - 1969OldsmobileVista CruiserBase5.7L 350 V8, 6.6L 400 V8
1970 - 1972OldsmobileVista CruiserBase5.7L 350 V8, 7.5L 455 V8
1968PontiacBeaumontBase5.0L 307 V8, 5.3L 327 V8, 5.7L 350 V8, 6.5L 396 V8
1969PontiacBeaumontBase5.0L 307 V8, 5.7L 350 V8, 6.5L 396 V8
1969PontiacGrand PrixBase6.6L 400 V8, 7.0L 428 V8
1970 - 1972PontiacGrand PrixBase6.6L 400 V8, 7.5L 455 V8
1968 - 1969PontiacGTOBase6.6L 400 V8
1970 - 1971PontiacGTOBase, The Judge6.6L 400 V8, 7.5L 455 V8
1972PontiacGTOBase6.6L 400 V8, 7.5L 455 V8
1968PontiacLeMansBase5.7L 350 V8, 6.6L 400 V8
1969PontiacLeMansBase, Safari5.7L 350 V8, 6.6L 400 V8
1970PontiacLeMansBase, Safari, Sport5.7L 350 V8, 6.6L 400 V8, 7.5L 455 V8
1971PontiacLeMansBase, Sport, T375.7L 350 V8, 6.6L 400 V8, 7.5L 455 V8
1972PontiacLeMansBase, Luxury, Sport5.7L 350 V8, 6.6L 400 V8, 7.5L 455 V8
1968 - 1969PontiacTempestBase, Custom, Safari5.7L 350 V8, 6.6L 400 V8
1970PontiacTempestBase, GT5.7L 350 V8, 6.6L 400 V8

Sign up for sales, arrivals, vehicle specific content and more.