Flowmaster American Thunder Crossmember-Back Exhaust System - Flowmaster (17119)

Sale Price$876.18
Description : 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.
Fits 1964-1972 GM A-Body with V8 engines, 2.5" pipes - Aluminized Steel - Aggressive to moderate sound
64-72 GM A-BODY 2.5 IN. AMT
SYS 64-72 GM
Does Not Include Factory Manifold Downpipes or Header Reducer Cones
Manufacturer of performance exhaust systems, mufflers, performance air intakes, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 4 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.
Fits 1964-1972 GM A-Body with V8 engines, 2.5" pipes - Aluminized Steel - Aggressive to moderate sound
64-72 GM A-BODY 2.5 IN. AMT
SYS 64-72 GM
Does Not Include Factory Manifold Downpipes or Header Reducer Cones
Manufacturer of performance exhaust systems, mufflers, performance air intakes, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 4 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.
- Return Policy
- Min. 12 Months
- Safe, Secure Checkout
Product Details
Installation GuideDescription
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.
Fits 1964-1972 GM A-Body with V8 engines, 2.5" pipes - Aluminized Steel - Aggressive to moderate sound
64-72 GM A-BODY 2.5 IN. AMT
SYS 64-72 GM
Does Not Include Factory Manifold Downpipes or Header Reducer Cones
Manufacturer of performance exhaust systems, mufflers, performance air intakes, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 4 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.
Fits 1964-1972 GM A-Body with V8 engines, 2.5" pipes - Aluminized Steel - Aggressive to moderate sound
64-72 GM A-BODY 2.5 IN. AMT
SYS 64-72 GM
Does Not Include Factory Manifold Downpipes or Header Reducer Cones
Manufacturer of performance exhaust systems, mufflers, performance air intakes, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 4 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.
Features & Benefits
- Fits most 1964-1972 GM A-Bodies with V8 engines and aftermarket long tube headers.
- Includes Hangers and Hardware for Easy Installation
- Mandrel-bent 16-Gauge Aluminized Steel Tubing
- Two Exit Style Choices: Slash Cut or Turndown
- Moderate to Aggressive Exterior Exhaust Tone
- Built-in Balance Pipe Equalizes Pressures
- Super 40 Series Performance Mufflers
- Flowmaster Quality & Reliability
- Crossmember-Back System
Part Number (MPN)
17119
Brand
SKU
17119
UPC / GTIN
700042014729 / 00700042014729
Condition
New
Disclaimer
No
Brand
Flowmaster
CARB (California) Compliant
Yes
Catalytic Converter Included
No
Catalytic Converter Quantity
0
Category
Exhaust
Clamping Type
U-Bolt
Clamps Included
Yes
Drive
2WD
Emission Code
5
Exhaust Series
American Thunder
Exhaust Tip Quantity
Sold Separately<br />0
Exhaust Tip Shape
Round
Exit Style
Dual Out Rear
Finish
Aluminized
Gasket Or Seal Included
No
Grade Type
Performance
Hangers Included
Yes
Heat Shield Included
No
Inlet Diameter
2.50
Inlet Type
Weld-On
Main Piping Diameter
2.50
Mounting Bracket Included
Yes
Muffler (Left) Body Height
5.00
Muffler (Left) Body Length
13.50
Muffler (Left) Body Width
10.00
Muffler (Left) Type
Chambered
Muffler (Right) Body Height
5.00
Muffler (Right) Body Length
13.50
Muffler (Right) Body Width
10.00
Muffler (Right) Type
Chambered
Muffler Body Length
13.00
Muffler Body Material
Aluminized Steel
Muffler Body Shape
Oval
Muffler Finish
Black High-Temperature Paint Finish
Muffler Flanged Inlet
No
Muffler Flanged Outlet
No
Muffler Included
Yes
Muffler Inlet Connection
Slip-Fit
Muffler Inlet Inside Diameter
2.50
Muffler Inlet Outside Diameter
2.63
Muffler Outlet Connection
Slip-Fit
Muffler Outlet Quantity
1
Muffler Part Number
952548
Muffler Quantity
2
Muffler Series
Super 40 Series
Muffler Type
Chambered
part type
Exhaust System
Pipe Color
Silver
Pipe Material
Aluminized Steel
Product Type
Exhaust System
Sound Level
Aggressive / Moderate
Spring Bolt Kit Included
No
Sub Category
Exhaust and Tail Pipes
Tail Pipe Outlet Outside Diameter
2.50
Tail Pipe Quantity
2<br />Dual
Tail Pipe Tapered Outlet
No
Valve Included
No
Valve Type
Not Applicable
| Year | Make | Model | Body & Trim | Engine & Transmission |
|---|---|---|---|---|
Vehicle #1
Year
Make
Model
Body & Trim
Engine & Transmission
Shipping Policy
Operated by RevolutionParts Inc · Effective date: 11/2025 · Last updated: 4/2026... Check out our Shipping Policy for more details.
Return Policy
At PartsDirect.parts, operated by RevolutionParts Inc, we want you to be completely satisfied with your purchase. This policy outlines how to cancel orders, initiate returns, and receive refunds. Please read it carefully before completing your purchase... Check out our Return Policy for more details.

