Flowmaster · New

Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System

Name: Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System
Brand: Flowmaster
SKU: flo818166
Price: 1068.95 USD

MPN 818166 · Store SKU flo818166

$1,068.95

CHECK AVAILABILITY0 in supplier warehouses. Ask JuiceBuilt about availability.

Supplier stock checked 11/7/2026, 9:32:22 PM UTC. Adding a part does not reserve it.

30-day returns for unopened, unused new parts

Request a return within 30 calendar days after delivery. New parts must be unopened and unused.

Shipping & returns ↗This policy does not limit rights required by law.

Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.

Product details

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. Fits 2021-2026 Ford F-150 with 3.5-liter PowerBoost Hybrid engine Flowmaster American Thunder Cat-Back Exhaust System

Manufacturer fitment & guides

Check 818166 against the manufacturer’s application information below.

A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.

Part-specific notes

Emissions acknowledgement required before purchase.
California Proposition 65: Y

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What is the return policy?

Request a return within 30 calendar days after delivery. New parts must be unopened and unused.

The customer pays return shipping for a change-of-mind return.

Any actual supplier restocking charge is disclosed before purchase.

Clearance and scratch-and-dent parts are final sale. No returns or refunds.

Read the full shipping & returns policy ↗

This policy does not limit rights required by law.

Flowmaster 21-25 Ford F-150 Power Boost 3.5L American Thunder Cat-Back Exhaust System

Product details

Manufacturer fitment & guides

Part-specific notes

THE NEXT PART
OF YOUR BUILD.

Free shipping on $100+ orders.

Build with the right brands.

Find your next upgrade.

Make the whole setup work.

A few things to know.

Your cart.

Freight & oversized shipping quote

Delivery address