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Straight-through sound without the drone of a glasspack.
The Flowmaster FlowFX is a straight-through absorption muffler with a moderate, aggressive tone. Part 71226 has a 2.5 in offset inlet and a 2.5 in center outlet on an oval 409 stainless body.
Specs: 2.50 in offset in / 2.50 in center out
| Part number | 71226 |
| Series | FlowFX |
| Inlet | 2.50 in, offset |
| Outlet | 2.50 in, center |
| Connection | Slip-fit (2.50 in ID / 2.63 in OD) |
| Body | Oval, 14 in long x 9 in wide x 4 in high |
| Overall length | 20 in |
| Core | 3.00 in straight-through perforated stainless |
| Material | 409 stainless steel, MIG welded |
| Sound level | Moderate |
| Fitment | Universal |
What's built into it
- Straight-through core. A 3 in perforated core wrapped in sound-absorbing material for flow and a smooth, deep tone.
- 409 stainless steel. Fully welded 409 stainless for corrosion resistance.
- Reversible. It can be installed in either direction, which helps with offset routing.
- Slip-fit connections. Weld it in or clamp it, whichever your system needs.
The Gearhead Take
Straight talk from 20+ years of wrenching, racing and selling parts. No fluff, just what matters before you buy.
- FlowFX is the pick when you want more sound than stock without going full straight-pipe loud.
- Measure before you buy. The body is 9 in wide and 20 in long overall, and the offset inlet needs room to line up.
- Clamps, hangers and tips aren't included, so budget for them.
- Welding gives the tightest seal. Clamps work, but check them for leaks after a few heat cycles.
FAQ
How loud is the FlowFX?
Flowmaster rates the FlowFX sound level as moderate, with a deep, aggressive tone. Actual volume depends on your engine and the rest of the system.
Will it fit my vehicle?
It's a universal muffler. It fits any system with 2.5 in pipe and room for an oval 14 x 9 in body and 20 in overall length.
Can I install it backwards?
Yes. The FlowFX is reversible, so the offset end can face either way.
Does it come with clamps or hangers?
No. Clamps, hangers and tips are sold separately.
Weld or clamp?
Either. The slip-fit ends take a 2.5 in pipe. Welding is the most leak-proof.
Will it cause a drone?
Straight-through absorption mufflers can drone on some vehicles at highway cruise. Results depend on the vehicle and the rest of the system.
Pairs well with
- 2.5 in exhaust clamps
- Exhaust hangers
- Exhaust tip
- Exhaust gaskets or sealant
Install overview
| Difficulty | Moderate (shop recommended if welding) |
| Time | About 1 to 2 hours |
| Tools | Jack stands, pipe cutter or saw, clamps or welder, measuring tape |
- Measure the space and mark where the old muffler will be cut out.
- Cut out the old muffler, square the pipe ends and clean them.
- Slide the FlowFX on, check clearance from the floor, fuel tank and suspension.
- Weld or clamp, hang it securely, then check for leaks with the engine running.
Fitment
Universal fit for 2.5 in exhaust systems with room for the 14 x 9 x 4 in oval body and 20 in overall length. Check emissions and noise rules where you live before installing.
Not sure it fits your ride? Hit us up with your year, make, model and pipe size and we'll confirm before you order.
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