Flowmaster Force II Cat-Back Exhaust System, Aluminized, Dual Rear/Side Exit for Ford F-150 (2004-2008)
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Warranty Information
Vendor warranty summary
Flowmaster Warranty
At a glance: Limited lifetime on most stainless mufflers and systems for the original owner and vehicle; 3 years aluminized and tips; 1 year FlowFX mufflers and electronics.
This is Flowmaster's warranty, not an NVMOS policy. We've summarized it in plain English to save you a search. The manufacturer's official terms always govern and can change without notice. Last reviewed on nvmos.com: November 4, 2026.
Coverage by product line
| Flowmaster product | Coverage |
|---|---|
| Stainless steel mufflers (except FlowFX) | Limited lifetime, for the life of the original vehicle |
| Stainless steel exhaust systems (including FlowFX systems) and stainless pipes | Limited lifetime, for the life of the original vehicle |
| Air intake kits and oiled filters (not cleaning kits); most other stainless accessories (not tips or race products) | Limited lifetime, for the life of the original vehicle |
| Aluminized steel mufflers, systems and pipes | 3 years from original purchase |
| Exhaust tips and other non-race accessories | 3 years from original purchase |
| Commercial use of aluminized or stainless products | 3 years from original purchase |
| Delta Force dry air filter elements | 2 years from original purchase |
| FlowFX mufflers, Elite Series headers, electronics such as Delta Boost modules | 1 year from original purchase |
What's covered
- Defects in materials and workmanship for the original purchaser
- Parts still owned by the original buyer and installed on the vehicle they were first fitted to
- Exchange for the same part number or a refund of the purchase price, at Flowmaster's option
What's not covered
- Normal wear, including changes in sound level and breakdown of packing in straight-through mufflers
- Cosmetic issues such as coatings and discoloration
- Racing vehicles and race products
- Improper installation, installation on a vehicle the part was not designed for, or moving it to another vehicle
- Alteration, misuse or repair
- Accidents, collisions, road impact and debris
- Header damage from exhaust wrap, or headers installed during a new or rebuilt engine's break-in
- Flowmaster-brand catalytic converters
- Labor, installation or removal, extra parts, towing, return shipping and consequential damages
How to make a Flowmaster warranty claim
- Start with the original retailer, or contact Flowmaster directly through Holley's tech line.
- For a direct return, get a Returned Material Authorization (RMA) number before shipping anything.
- Send the part to the address Flowmaster gives you with the RMA number and proof of purchase showing where it was bought, the price, the product and the date.
- If Flowmaster finds a defect, it exchanges the part for the same part number or refunds the purchase price.
Flowmaster contact: Holley tech care and warranty exchanges (Flowmaster): 1-866-464-6553. Holley customer service: (800) 638-0032. Help page: https://holley.com/help/ · Warranty page
Bought it from NVMOS? Start with us.
Flowmaster's first route for a claim is the original retailer, and it needs proof of purchase showing the seller, price, product and date, which is all on your NVMOS order. Contact us first and we will put the claim together, get the RMA and work with Flowmaster on the exchange or refund. Have your order number and a few photos of the issue ready, then call or text us at (920) 249-7744 or send us a message.
Shop Flowmaster at NVMOS
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See all Flowmaster products, lead times and FAQs →
Disclaimer: The information on this page describes Flowmaster's own warranty policy. It is not a warranty offered by NVMOS (No Visible Means of Support LLC). Manufacturers update their terms at any time; we review these pages periodically, but the manufacturer's current official policy is the one that applies to your claim. Sources: Flowmaster product warranty details, Rev. 2/5/18 (official, Holley-hosted) and Flowmaster warranty, 2026 update copy (Flowmaster document hosted by Speedway Motors) and About Flowmaster (official) and Flowmaster cat-back exhaust systems (official). Last updated on nvmos.com: November 4, 2026. See our return policy for NVMOS's own terms.
About the brand
Flowmaster has made performance mufflers and exhaust systems since 1983 and now sits in Holley's family of brands, which handles its tech support and warranty exchanges. At NVMOS we carry Flowmaster cat-back systems and mufflers for the Toyota, Ford, Chevy, GMC, Ram, Nissan and Jeep trucks and SUVs we support.
Lead time: In-stock parts ship in 1-3 business days; parts stocked at the manufacturer take about 1-2 weeks.
Shop all 475 FlowmasterWarrantyAll brands
Warranty terms are set by Flowmaster, not NVMOS, and can change. Bought from us? Call (920) 249-7744 and we'll handle the claim with the brand.
Flowmaster Force II Cat-Back Exhaust System, Aluminized, Dual Rear/Side Exit for Ford F-150 (2004-2008)
A Force II cat-back exhaust for the Ford F-150 (2004-2008) with the 4.6L or 5.4L engine. It pairs mandrel-bent 2.5-inch aluminized tubing with a Super 50 muffler, and it ends in 3-inch polished tips. It suits daily drivers and tow rigs that want a little more voice than stock.
| Spec | Detail |
|---|---|
| Fitment | Ford F-150 (2004-2008) |
| Engine | 4.6L, 5.4L |
| Material | Aluminized steel |
| Tubing | 2.5 in. |
| Muffler | Super 50 |
| Exit | Dual rear or dual side |
| Tips | 3 in. polished |
| Sound level | Mild |
| Part number | 17418 |
It fits 2WD and 4WD models and all wheelbases. It mounts to the factory hanger locations and the hardware is included. Not sure it fits your build? Call or text us at (920) 249-7744 with your year, trim and setup and we will confirm it.
Will this fit my F-150?
It fits the Ford F-150 (2004-2008) with the 4.6L or 5.4L engine. It fits 2WD and 4WD models and all wheelbases.
How loud is it?
Flowmaster rates it mild. The tone comes from a Super 50 muffler.
Can I choose where it exits?
Yes. It can be set up to exit to the rear or to the side.
What is the warranty?
See our Flowmaster warranty page for the current terms.
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Specifications
Flowmaster Force II Cat-Back Exhaust System, Aluminized, Dual Rear/Side Exit for Ford F-150 (2004-2008) FAQs
Will this fit my F-150?
It fits the Ford F-150 (2004-2008) with the 4.6L or 5.4L engine. It fits 2WD and 4WD models and all wheelbases.
How loud is it?
Flowmaster rates it mild. The tone comes from a Super 50 muffler.
Can I choose where it exits?
Yes. It can be set up to exit to the rear or to the side.
What is the warranty?
See our Flowmaster warranty page for the current terms.
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