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Flowmaster 40 Series Muffler (Delta-Flow)


Reviews Views Date of last review
9 13747 2009-7-13
Recommended By Average Price Average Rating
100% of reviewers $181.67 8.9
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Description: The most aggressive-sounding street and strip muffler in the Flowmaster product line. The 40 Series Delta Flow generates a powerful, aggressive sound outside the vehicle with minimal interior resonance. with increased horsepower, torque and fuel economy. If you are looking for the traditional "Flowmaster sound," the 40 Series Delta Flow offers more of it than any other muffler.
Website: www.flowmastermufflers.com
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Posts: 6,231
Registered: May 2001



telecons

Registered: July 2005
Posts: 4
Review Date: 2005-7-22 Would you recommend the product? Yes | Price you paid?: $75.00 | Rating: 9 

 
Pros: more torque
Cons: not loud enough

Installed on 93 F150 5.0L. Wanted a more manly sounding truck. Some noticable increase in engine performance.


Not loud enough due to the fact that, by nature, the catalytic converter cuts down on engine noise b4 it gets to tail end exhaust.


Has a good hollow sound though.
WanBammoFakkie

Registered: August 2005
Posts: 25
Review Date: 2005-11-29 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 10 

 
Pros: Deep Tone, Not Overpowering
Cons: none.

Third Vehicle with one of these. You can never go wrong. Not too loud at highway speeds to drive you friggin' nuts. Sounds great at startup and idle. City driving is throaty enough to set you apart from the rest. Just a hint, Buy the cat-back DOR on Ebay for $125.00. Same components, same results.
05F-150XLT

Registered: August 2005
Posts: 1271
Review Date: 2005-12-22 Would you recommend the product? Yes | Price you paid?: $220.00 | Rating: 10 

 
Pros: Nice and loud
Cons: none

I love the sound it gives out and couldnt ask for anything better.
snowman54

Registered: May 2006
Posts: 359
Review Date: 2006-10-2 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 8 

 
Pros: more flow not too loud
Cons: 3rd gear drone is annoying!!

I like the sound, will be upgrading to a 3 inch system here soon with a 40 series
nemesis500548

Registered: July 2004
Posts: 104
Review Date: 2008-6-24 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 5 

 
Pros: Better sound
Cons: no performance of mpg gains

Switched from stock muffler to 40 series, a little bit better sound, but not much, no performance of mpg gains. Upgraded to Super 40. MUCH better sound, and no not obnocious. Very slight increase in performance, no mpg gains.
bonoboIIhauler

Registered: March 2008
Posts: 11
Review Date: 2008-12-29 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 9 

 
Pros: Sounds Great!
Cons: None

Switched from single in dual out 40 series to true dual 40 series with H pipe and rear cats removed on 04 5.4...sounds SO much better! Nice rumble at idle, sounds sweet around town and on highway! A little punch of the throttle really wakes it up now. Get true duals NOT single in dual out...trust me!
Bowers

Registered: May 2009
Posts: 163
Review Date: 2009-6-16 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 10 

 
Pros: Great rumble
Cons: I use to much gas, just to hear the pipes

It's on my 89 5.0 lariat, with long headers, not Cat's, True dueled, and 18x4 inch tip's, I LOVE IT. Sounds better that my 1980 camaro Z28
Tallone_CO

Registered: July 2009
Posts: 2
Review Date: 2009-7-1 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 10 

 
Pros: Awesome sound and added HP
Cons: None

I have 3" with these on a 2004 Heritage 4.6. The sound is awesome and I can feel a bit of added power. Also helped the MPG by 1-2.
Texas210Badass

Registered: July 2009
Posts: 13
Review Date: 2009-7-13 Would you recommend the product? Yes | Price you paid?: $250.00 | Rating: 9 

 
Pros: added HP
Cons: sound not too great

i got my 40 series for my 5.4 V8 a few years back and i kept telling myself i wanted it louder. it had a great deep sound when i started the truck but when accelerating and driving no one could tell i had flows. so recently i took off the cats, which you need to pass inspection in TX...but straight pipe to flow master sounds EXCELLENT! its loud ALL the time. but i must admit it is obnoxious too!


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