Flowmaster 425404 40 Series Muffler - 2.50" IN(D)/OUT(D) - Aggressive Sound
Flowmaster 425404 40 Series Muffler - 2.50" IN(D)/OUT(D) - Aggressive Sound
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Flowmaster

Flowmaster 425404 40 Series Muffler - 2.50" IN(D)/OUT(D) - Aggressive Sound

4.9 stars out of 8 reviews
(4.9)|
8 ratings
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Key item features

  • No internal packing to blowout
  • Excellent Street/Strip and Off Road application
  • Aggressive Sound Exterior Exhaust Tone
  • Durable fully welded 16 gauge aluminized steel
Current price is $101.95
Price when purchased online
  • Free shipping
  • Free 90-day returns

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Columbus, 43215
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Flowmaster 425404 40 Series Muffler - 2.50" IN(D)/OUT(D) - Aggressive Sound
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Flowmaster 42443 40 Series Muffler - 2.25 Offset In / 2.25 Offset Out - Aggressive Sound
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Flowmaster 842515 Super 10 Muffler 409S - 2.50 Center In / 2.50 Center Out - Aggressive Sound
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Flowmaster 42441 40 Series Muffler - 2.25 Offset In / 2.25 Center Out - Aggressive Sound
Flowmaster 42441 40 Series Muffler - 2.25 Offset In / 2.25 Center Out - Aggressive Sound
current price $101.95
Flowmaster 42441 40 Series Muffler - 2.25 Offset In / 2.25 Center Out - Aggressive Sound
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Flowmaster 42543 40 Series Muffler - 2.50 Offset In / 2.50 Offset Out - Aggressive Sound
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current price $101.95
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Comparison Chart:
Vehicle modelFLW425404Flowmaster 425404 40 Series Muffler - 2.50" IN(D)/OUT(D) - Aggressive SoundFLO8425154Flowmaster 8425154 Super 10 Series Muffler-Flowmaster 425403 Exhaust Muffler8425152Flowmaster 8425152 Super 10 Muffler 409S - 2.50 Center In / 2.25 Dual Out - Aggressive Sound-Flowmaster 842512 Super 10 Series Muffler - 2.50 in. IN/OUT - Aggressive Sound42443Flowmaster 42443 40 Series Muffler - 2.25 Offset In / 2.25 Offset Out - Aggressive Sound842515Flowmaster 842515 Super 10 Muffler 409S - 2.50 Center In / 2.50 Center Out - Aggressive Sound42441Flowmaster 42441 40 Series Muffler - 2.25 Offset In / 2.25 Center Out - Aggressive Sound42543Flowmaster 42543 40 Series Muffler - 2.50 Offset In / 2.50 Offset Out - Aggressive Sound
Inlet diameter2.5 inFlowmaster 425404 40 Series Muffler - 2.50" IN(D)/OUT(D) - Aggressive Sound2.500 in.Flowmaster 8425154 Super 10 Series Muffler2.5 inFlowmaster 425403 Exhaust Muffler2.50 inFlowmaster 8425152 Super 10 Muffler 409S - 2.50 Center In / 2.25 Dual Out - Aggressive Sound2.500 in.Flowmaster 842512 Super 10 Series Muffler - 2.50 in. IN/OUT - Aggressive Sound2.250 inFlowmaster 42443 40 Series Muffler - 2.25 Offset In / 2.25 Offset Out - Aggressive Sound2.500 in.Flowmaster 842515 Super 10 Muffler 409S - 2.50 Center In / 2.50 Center Out - Aggressive Sound2.25 inFlowmaster 42441 40 Series Muffler - 2.25 Offset In / 2.25 Center Out - Aggressive Sound2.500 inFlowmaster 42543 40 Series Muffler - 2.50 Offset In / 2.50 Offset Out - Aggressive Sound
Outlet diameter2.50 inFlowmaster 425404 40 Series Muffler - 2.50" IN(D)/OUT(D) - Aggressive Sound2.500 inFlowmaster 8425154 Super 10 Series Muffler3.00 inFlowmaster 425403 Exhaust Muffler2.25 inFlowmaster 8425152 Super 10 Muffler 409S - 2.50 Center In / 2.25 Dual Out - Aggressive Sound2.500 inFlowmaster 842512 Super 10 Series Muffler - 2.50 in. IN/OUT - Aggressive Sound2.500 inFlowmaster 42443 40 Series Muffler - 2.25 Offset In / 2.25 Offset Out - Aggressive Sound2.500 inFlowmaster 842515 Super 10 Muffler 409S - 2.50 Center In / 2.50 Center Out - Aggressive Sound2.25 inFlowmaster 42441 40 Series Muffler - 2.25 Offset In / 2.25 Center Out - Aggressive Sound2.500 inFlowmaster 42543 40 Series Muffler - 2.50 Offset In / 2.50 Offset Out - Aggressive Sound
Muffler typeStraight-Through MufflersFlowmaster 425404 40 Series Muffler - 2.50" IN(D)/OUT(D) - Aggressive SoundStraight-Through MufflersFlowmaster 8425154 Super 10 Series MufflerStraight-Through MufflersFlowmaster 425403 Exhaust MufflerStraight-Through MufflersFlowmaster 8425152 Super 10 Muffler 409S - 2.50 Center In / 2.25 Dual Out - Aggressive SoundStraight-Through MufflersFlowmaster 842512 Super 10 Series Muffler - 2.50 in. IN/OUT - Aggressive SoundStraight-Through MufflersFlowmaster 42443 40 Series Muffler - 2.25 Offset In / 2.25 Offset Out - Aggressive SoundChambered MufflersFlowmaster 842515 Super 10 Muffler 409S - 2.50 Center In / 2.50 Center Out - Aggressive SoundChambered MufflersFlowmaster 42441 40 Series Muffler - 2.25 Offset In / 2.25 Center Out - Aggressive SoundStraight-Through MufflersFlowmaster 42543 40 Series Muffler - 2.50 Offset In / 2.50 Offset Out - Aggressive Sound
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Customer ratings & reviews

4.9 out of 5 stars
stars8 ratings6 reviews
How item rating is calculated
  1. 5 stars88% (7)
  2. 4 stars13% (1)
  3. 3 stars0% (0)
  4. 2 stars0% (0)
  5. 1 star0% (0)

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Showing 1-3 of 6 reviews

Oct 5, 2025
Rob R
5 out of 5 stars review

Seller Verified Purchase

Flowmaser 40 muffler for Dodge Challenger R/T.

I ordered a Flowmaster 40 muffler for my 2010 Dodge Challenger r/t after the Dodge dealer said original muffler was discontinued. Turns out the Flowmaster is an exact fit. The Hemi sounds great. Not too loud and sounds like a musclecar should. I've bought parts from Jegs for 30 years and have always gotten great parts at great prices.

Review from jegs.com
Helpful?7KPEH14L9T1I198227418
Mar 25, 2017
KENNETH H
5 out of 5 stars review

Seller Verified Purchase

You have to own these. Matches my Harley sound now.

Easy directions. Put this cat-back on in a couple of hours. Taking my time. Perfect fit. All parts were in the box. Quality product that sounds great. Welded up when finished as Flowmaster recommends. [This review was collected as part of a promotion.]

Review from jet.com
Helpful?7KPEH14L9T1I198227418
Jun 13, 2023
lisa
Walmart Associate
Sold bySuperShops
5 out of 5 stars review

Verified Purchase

Happy muffler customer

This item is just as we wanted. It was like half the price at Walmart than anywhere in my town. It fit perfectly. The delivery was a day earlier than scheduled.

Incentivized Review
Helpful?7KPEH14L9T1I198227418