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  • Flowmaster 70-74 Camaro/Firebird American Thunder Crossmember-Back Exhaust System - 17149
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Flowmaster 70-74 Camaro/Firebird American Thunder Crossmember-Back Exhaust System - 17149
Flowmaster 70-74 Camaro/Firebird American Thunder Crossmember-Back Exhaust System - 17149
Flowmaster 70-74 Camaro/Firebird American Thunder Crossmember-Back Exhaust System - 17149
Flowmaster 70-74 Camaro/Firebird American Thunder Crossmember-Back Exhaust System - 17149
Flowmaster 70-74 Camaro/Firebird American Thunder Crossmember-Back Exhaust System - 17149
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Flowmaster 70-74 Camaro/Firebird American Thunder Crossmember-Back Exhaust System - 17149

Exhaust, Mufflers & Tips Catback
Flowmaster
flo17149
Special order
September 23, 2026
Not CARB compliant. Not legal for sale or use in California on emissions-controlled vehicles.
$917.66 $1,068.95
This American Thunder® exhaust system comes as a complete true dual Crossmember-Back exhaust for your 1970-1974 Chevrolet Camaro or Pontiac Firebird with V8 engine. These dual systems feature 2.50-inch mandrel-bent aluminized steel tubing for maximum performance, includes a built-in H-pipe/balance tube flowing into a pair of Slimline 50 Series® Delta Flow mufflers that deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The 2.50-inch tailpipes exit straight out under the rear bumper and are finished off with 2.50-inch angle-cut brushed stainless steel tips and includes all hangers and necessary hardware for installation. Like all Flowmaster® systems, the benefits include improved throttle response, power and mileage. Covered by our 3-year Limited Warranty. Fits 1970-1974 Chevrolet Camaro and Pontiac Firebird with V8 engine. Features & Benefits Specially Designed Slimline 50 Series Mufflers for Max Clearance Does Not Include Header Reducers or Factory Manifold Downpipes Includes 2.50-inch Polished 304 Stainless Steel Tips Moderate to Aggressive Sound Exterior Exhaust Note H-pipe Crossover for Maximum Power and Deep Tone Includes Hangers and Hardware for Installation Mandrel-bent 16-gauge Aluminized Steel Tubing Crossmember-Back True Dual Exhaust System
Flowmaster 94-97 Ford F250/F350 Truck Force II Cat-Back Exhaust System - 17211
Flowmaster 94-97 Ford F250/F350 Truck Force II Cat-Back Exhaust System - 17211
$787.95 $627.86
Flowmaster 87-96 F150 4.9L/5.0L Force II Cat-Back Exhaust System - 17135
Flowmaster 87-96 F150 4.9L/5.0L Force II Cat-Back Exhaust System - 17135
$701.95 $559.69
Flowmaster 70-74 Camaro/Firebird American Thunder Crossmember-Back Exhaust System - 17149
SKU: flo17149
Product Details

Everything You Need To Know

Review product information, shipping and returns, and price-match details before you order.

Product Info

This American Thunder® exhaust system comes as a complete true dual Crossmember-Back exhaust for your 1970-1974 Chevrolet Camaro or Pontiac Firebird with V8 engine. These dual systems feature 2.50-inch mandrel-bent aluminized steel tubing for maximum performance, includes a built-in H-pipe/balance tube flowing into a pair of Slimline 50 Series® Delta Flow mufflers that deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The 2.50-inch tailpipes exit straight out under the rear bumper and are finished off with 2.50-inch angle-cut brushed stainless steel tips and includes all hangers and necessary hardware for installation. Like all Flowmaster® systems, the benefits include improved throttle response, power and mileage. Covered by our 3-year Limited Warranty.

Fits 1970-1974 Chevrolet Camaro and Pontiac Firebird with V8 engine.

Features & Benefits

  • Specially Designed Slimline 50 Series Mufflers for Max Clearance
  • Does Not Include Header Reducers or Factory Manifold Downpipes
  • Includes 2.50-inch Polished 304 Stainless Steel Tips
  • Moderate to Aggressive Sound Exterior Exhaust Note
  • H-pipe Crossover for Maximum Power and Deep Tone
  • Includes Hangers and Hardware for Installation
  • Mandrel-bent 16-gauge Aluminized Steel Tubing
  • Crossmember-Back True Dual Exhaust System
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To start the return process, please e-mail sales@allianceracing.com

Include the following:
Subject "Return for Order#"
Order Number
Part Number
Reason

Returns are eligible for up to 14 days from delivery of items. Accepted refunds can take up to 7-10 business days to process. All refunds are subject to a 25% restocking fee, if opened. Customer may be responsible for return shipping. If 14 days have gone by since your item was delivered, unfortunately we can’t guarantee you a refund or exchange. We reserve the right to deny any return request, based on provided information.

Alliance Racing is not responsible for ensuring part fitment. It is the responsibility of the purchaser to ensure the parts being ordered are the correct fitment for the vehicle intended. Alliance Racing will not accept any returns for incorrect fitment after product is opened.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

Shipping

To return your product, mail your product to:
Alliance Racing LLC
8810 Twin Lakes Blvd
Tampa, FL 33614

In many cases, you will be responsible for shipping costs to return your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping will be deducted from your refund.

Depending on your location, the time it may take for your exchanged product to reach you may vary.

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Please note that there are cases when we cannot offer a price match, but we will do everything in our power to try to match it. Some manufacturers have Pricing Policies that we have to adhere to.

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