Flowmaster Warranty
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
Flowmaster Signature Series Cat-Back Exhaust System, Dual Rear Exit for Ram 1500 (2025-2026)
Flowmaster Flow FX Direct-Fit Dual-Mode Muffler with Active Valve for Ram 1500 (2009-2024)
Flowmaster Scavenger Series Elite Shorty Headers for Ford F-150 (2004-2010) 5.4L
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.
