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  • Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
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Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
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Load image into Gallery viewer, Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
Load image into Gallery viewer, Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
Load image into Gallery viewer, Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
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Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166

Exhaust, Mufflers & Tips Catback
Flowmaster
flo818166
In stock
Not CARB compliant. Not legal for sale or use in California on emissions-controlled vehicles.
$917.66 $1,068.95
This Flowmaster® American Thunder cat-back exhaust system is for the 2021-2026 Ford F-150 with the 3.5-liter PowerBoost. This system is manufactured using durable 409 stainless steel tubing and is mandrel bent for better exhaust gas flow. A specially tuned resonator is used for a deep, moderate to mild sound level and maximum performance. This system uses a 5.00-inch black ceramic coated stainless steel tip for added style. This system uses all the existing factory hanger locations and includes installation instructions and all necessary hardware for an easy installation that you can do at home. Backed by Flowmaster's Lifetime Limited Warranty. Does not fit models with OEM active exhaust option. Features & Benefits 3.00-inch and 3.5-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability Kit includes complete hardware and factory styled hangers in the stock locations for an easy installation A specially tuned resonator delivers a deep, moderate to mild performance tone and improves exhaust flow A 5.00-inch black ceramic coated stainless steal tip add a custom look to the vehicle Lifetime Limited Warranty
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$526.95 $452.05
Flowmaster 24-25 Mustang 5.0L Outlaw Cat-Back Exhaust System - Black Tip (Non-Valved) - 818161
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$2,249.95 $1,931.96
Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System - 818166
SKU: flo818166
Product Details

Everything You Need To Know

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

Product Info

This Flowmaster® American Thunder cat-back exhaust system is for the 2021-2026 Ford F-150 with the 3.5-liter PowerBoost. This system is manufactured using durable 409 stainless steel tubing and is mandrel bent for better exhaust gas flow. A specially tuned resonator is used for a deep, moderate to mild sound level and maximum performance. This system uses a 5.00-inch black ceramic coated stainless steel tip for added style. This system uses all the existing factory hanger locations and includes installation instructions and all necessary hardware for an easy installation that you can do at home. Backed by Flowmaster's Lifetime Limited Warranty.

Does not fit models with OEM active exhaust option.

Features & Benefits

  • 3.00-inch and 3.5-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
  • Kit includes complete hardware and factory styled hangers in the stock locations for an easy installation
  • A specially tuned resonator delivers a deep, moderate to mild performance tone and improves exhaust flow
  • A 5.00-inch black ceramic coated stainless steal tip add a custom look to the vehicle
  • Lifetime Limited Warranty
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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.

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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.

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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.

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