First order? Use FIRSTORDER for 5% off.
×

Questions? E-mail us:

sales@allianceracing.com

0 My Cart: $0.00

Your cart is currently empty.

Continue shopping
Toggle menu
Alliance Racing
0
  • Home
  • Flowmaster
  • Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System - 817428
-20%
Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System - 817428
Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System - 817428
Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System - 817428
Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System - 817428
Click to zoom in
Load image into Gallery viewer, Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System - 817428
Load image into Gallery viewer, Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System - 817428
Load image into Gallery viewer, Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System - 817428
Load image into Gallery viewer, Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System - 817428
Buyer Confidence

Shop With Confidence

Clear availability, helpful support, and customer-first policies before you check out.

  • Competitive Pricing

    We will beat most prices!

  • Questions?

    Contact us at sales@allianceracing.com

  • Free Shipping

    Free shipping on orders over $300!

Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System - 817428

Exhaust, Mufflers & Tips Catback
Flowmaster
flo817428
Special order
September 23, 2026
Not CARB compliant. Not legal for sale or use in California on emissions-controlled vehicles.
$1,051.25 $1,318.95
This Flowmaster system is for the person who is looking for a stainless steel cat-back exhaust system with an aggressive exterior tone and moderate interior tone for the 1999 to 2007* (2007 Classic Only) GM 1500 Extended Cab/Short Bed trucks with the 4.3L, 4.8L or 5.3L engines. The American Thunder® system is heavy 16-gauge mandrel-bent stainless steel tubing for durability and maximum performance. Includes a stainless steel Super 40™ Series performance muffler for that perfect blend of a deep aggressive exterior sound, with a moderate interior tone that won't drive you out of the cab when having a conversation. The dual 2.50-inch tailpipes clear the factory spare tire and give you two choices of exit locations. Straight out the back for that true dual look, or exiting out each side behind the rear wheels, which is ideal for towing. The system is finished off with a pair of highly polished 304 stainless steel tips embossed with the Flowmaster® name. Designed for an easy fit, these systems include all necessary parts, hardware and instructions for an easy installation you can do at home. Fits 1999-2007* (*Classic body) Chevrolet Silverado & GMC Sierra 1500 4.3L, 4.8L and 5.3L engine with single-flanged catalytic...
Flowmaster 99-06 GM 1500 SCB V8 American Thunder SS Cat-Back Exhaust System - 817435
Flowmaster 99-06 GM 1500 SCB V8 American Thunder SS Cat-Back Exhaust System - 817435
$1,406.95 $729.22
Flowmaster 68-72 GM A-BODY 2.5in. American Thunder SS Exhaust System - 817409
Flowmaster 68-72 GM A-BODY 2.5in. American Thunder SS Exhaust System - 817409
$1,257.95 $1,002.80
Flowmaster 99-06 GM C/K 1500 ECB American Thunder SS Cat-Back Exhaust System - 817428
SKU: flo817428
Product Details

Everything You Need To Know

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

Product Info

This Flowmaster system is for the person who is looking for a stainless steel cat-back exhaust system with an aggressive exterior tone and moderate interior tone for the 1999 to 2007* (2007 Classic Only) GM 1500 Extended Cab/Short Bed trucks with the 4.3L, 4.8L or 5.3L engines. The American Thunder® system is heavy 16-gauge mandrel-bent stainless steel tubing for durability and maximum performance. Includes a stainless steel Super 40™ Series performance muffler for that perfect blend of a deep aggressive exterior sound, with a moderate interior tone that won't drive you out of the cab when having a conversation. The dual 2.50-inch tailpipes clear the factory spare tire and give you two choices of exit locations. Straight out the back for that true dual look, or exiting out each side behind the rear wheels, which is ideal for towing. The system is finished off with a pair of highly polished 304 stainless steel tips embossed with the Flowmaster® name. Designed for an easy fit, these systems include all necessary parts, hardware and instructions for an easy installation you can do at home.

Fits 1999-2007* (*Classic body) Chevrolet Silverado & GMC Sierra 1500 4.3L, 4.8L and 5.3L engine with single-flanged catalytic converter. Fits 2/4 wheel drive with extended cab/short bed with 143.5-inch wheelbase.

Features & Benefits

  • Includes Hangers and Hardware for an Easy Installation
  • Mandrel-bent 16-gauge Stainless Steel Tubing
  • Moderate to Aggressive Exterior Exhaust Tone
  • Connects After Factory Catalytic Converter
  • Super 40 Series Performance Muffler
  • Uses the Factory Hanger Locations
  • Lifetime Limited Warranty
  • Easy Installation
Read More
Read Less

Shipping on new purchases

In Stock Items:
In stock items typically ship within 1-3 business days. Most items arrive within 2 business days, but there are situations where it may take up to 5 business days.

Special Order Items:
Special order and out of stock items are product-specific and lead times can vary. Please e-mail us if you are looking for an ETA / Lead Time on a specific product. Special order orders are subject to cancellation if the vendor cannot provide any ETA.

Returns Policy

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.

If you are shipping an item over $100, you should consider using a trackable shipping service and/or purchasing Shipping Insurance.

To initiate a price match, please e-mail sales@allianceracing.com with the product information (SKU, URL, & Part Name) and a link to the competitors product page for us to validate the price match eligibility.

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.

Your cart

×