Flowmaster 21-25 F-150 FlowFX Direct Fit Muffler

Flowmaster's FlowFX direct fit muffler system is built for the 2021-2026 Ford F-150. It connects to the factory dual tail pipes and gives the truck an aggressive to moderate exhaust note, in the brand's words, through a 409 stainless steel system with 3.00 inch mandrel bent pipes.

Why Upgrade to a FlowFX Muffler

Per Flowmaster, here is what the system changes:

• An aggressive to moderate sound level from the FlowFX Series muffler. You hear the truck when you get on the throttle.
• An increase of 18 hp and 14 ft/lbs at the rear wheels on the dyno, the brand's own figures.
• 3.00 inch mandrel bent pipes, so the tubing keeps its shape around every bend instead of pinching where exhaust gas needs room to flow.
• Durable 409 stainless steel throughout, the same metal for every piece of the system.
• Direct fit: it connects straight to the factory dual tail pipes and hangs on all the existing factory hangers, so the tailpipes you already have stay on the truck.

Fitment Notes

Fits 2021-2026 Ford F-150 in Base and Tremor trims. Flowmaster lists it for trucks with the 2.7, 3.5 or 5.0 liter engines. Does not fit F-150 Lightning, Raptor or Raptor R. [VERIFY: cab and bed configuration coverage.]

More Mufflers that fit your F-150

Install and Honest Talk

Flowmaster says this connects directly to the factory dual tail pipes and hangs on all the existing factory hangers, with installation instructions and all the necessary hardware in the box, and calls it an install you can do at home. What comes off the truck, whether you need a lift and what tools it takes are not spelled out, so read the instructions before you crawl under it.

Aggressive to moderate is the brand's own description of the sound, and that means you will hear this truck in the cabin, on the highway too, not only on a cold start in the driveway. If you tow or commute long miles and like a quiet cab, weigh that first. The 18 hp and 14 ft/lbs are Flowmaster's rear wheel dyno numbers, not ours, and your truck, engine and conditions will land where they land. What else you need: Flowmaster says all necessary hardware and instructions are included. [VERIFY: what comes off the truck, tools or lift needed, tune requirement.]

Specs

• Brand: Flowmaster
• Part number: 718172
• Part type: Muffler
• Quantity: 1 muffler system. [VERIFY: piece count in the box.]
• Muffler series: FlowFX
• Material: 409 stainless steel throughout
• Pipe diameter: 3.00 inch, mandrel bent
• Sound level (per Flowmaster): Aggressive to moderate
• Dyno result (per Flowmaster): 18 hp and 14 ft/lbs at the rear wheels
• Engines listed by Flowmaster: 2.7, 3.5 or 5.0 liter
• Connection: Connects to the factory dual tail pipes, uses all existing factory hangers
• Included (per Flowmaster): Installation instructions and all necessary hardware
• Warranty: Flowmaster One (1) Year Limited Warranty

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Free US shipping over $99

Orders over $99 ship free by ground to the lower 48 states. Alaska, Hawaii and Canada are not included; shipping to those addresses is calculated at checkout. Some oversize or heavy parts (long-tube exhausts, bumpers, full lift kits) go freight instead of parcel: free to a commercial address with a loading dock, and residential freight delivery carries an additional charge.

When it ships

Parts ship direct from the distributor warehouse that stocks them, so dispatch timing depends on the part, not on a single cutoff. You get a confirmation with tracking as soon as it leaves, and tracking shows the delivery estimate for your address. If a part is backordered we email you an expected availability date.

Missing or damaged items

Report a short shipment or shipping damage within 5 business days of delivery. For a packing error, send us the date or package code printed on the label along with the part number so we can trace it with the warehouse.

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.

To start a return, you can contact us at help@anythingcoyote.com or fill our our contact form. If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted. 

You can always contact us for any return question at help@anythingcoyote.com.

Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Exceptions / non-returnable items
Certain types of items cannot be returned, like perishable goods (such as food, flowers, or plants), custom products (such as special orders or personalized items), and personal care goods (such as beauty products). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.

Unfortunately, we cannot accept returns on sale items or gift cards.

Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.