Gave my car a true sport sound, and improved my acceleration.

None. It could be a bit louder...but I believe it will get louder once it has time to break in.

Lets just say this. Flowmaster is the only muffler. Period. I put a Flowmaster 40 series Delta Flow on my '97 Lumina and it just rocks! It's not REALLY loud, but it's just enough. The Delta Flow system of the muffler cuts down the interior resonance, but believe me, there is still some there. Just enough to give my car a true sports car sound and feel. My acceleration has also improved, I noticed this the first day I got it! If you want your car to sound like a true sports car...regardless of the make and year...trust me...just go with the Flow! Just a brief note: My personal belief is that this muffler is best used on a car/truck with at least a V6 engine. Good luck everyone...there is no other sound like it!

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Stock. My friend has a Chevy Beretta, and he cut off his muffler completely and put on a glass pack. The sound is awesome! He is one of the people who inspired me to put this muffler on my car, and

GOOD PERFORMANCE,WELL BUILT

VERY LOUD,VERY RASPY AT HIGH RPMS.ALL OF FLOWMASTERS MUFFLERS ARE CRAPPY SOUNDING ON INLINE ENGINES EXCEPT THE 60 SERIES MUFFLER.

I HAD A MAC FLOWPATH MUFFLER ON MY CIVIC, AND AFTER ONLY 2 YEARS IT HAD A BIG HOLE IN IT.MY BUDDY GAVE ME A FLOWMASTER 40 SERIES ORIGINAL AND IT IS ALOT BETTER THAN THE MAC FLOWPATH, BUT IS STILL VERY LOUD AND RASPY

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BROSPEED,MAC FLOWPATH, DYNOMAX SUPER TURBO

product looks good

product sucks

Today I finally got my Flowmaster 40 series installed on my '85 Chevy Caprice and I would have expected at least a slight difference in sound. But no, the sound is the same as before. What a waiste of money that was. Flowmaster sucks!!!

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glass packs

Construction, sound, did I mention mileage improvement. Also feel from the butt meter a little more hp too. Definitely turns heads too!

Yeah right....

I had Delta Flow 40's mounted with 3 1/2" rear exit slash tips. I now live to start this thing up in the morning, deep deep bass rumble that smooths out to a great sound. Some noise in the cab but hey it mellows out at cruising speed. Looked at Borla, Gibson and others, but got this done locally, with essentially the same design (mandrel bent pipes, welded seams) for a lot less than the others. First tank of gas indicates about a 1.5 mpg improvement and I was already getting 19 out of a 5.3 LM7 with a 3.73 locker. I kept the exit pipes at 2.25 to keep torque down low in rpm range and this thing absolutely sings...

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Thrush Turbo, Cherry Bombs

I got cool stickers

Everything, pitiful sound, no crackle, no rumble, quieter than a 4 cylinder

At $82.50 a muffler I wasted $165.00 These mufflers made my car quieter than when it was stock. I should have just put glass packs on it because they are only $18 a piece at the local auto parts and I wouldn't have to special order them. They suck on my Monte Carlo SS. I put a glass pack on my 99 Ranger 3.0L and it is louder and more noticable than a 305 H.O. with FLOWMASTERS. I guess different cars have different responses to flowmasters, i got the 40 series. I would recommend anyone with a Monte Carlo SS not to waste their money on the flowmasters. They are quieter than stock.

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Glass Packs....Long live the good old cherry bomb

can someone help trying to find good loud muffler for ranger with 4.0

Can someone tell me if this will be a good peoduct for a 95 SOHC neon I want a nice deep sound but not something that will get the cops on me let me know email is gibenjune@yahoo.com

best sounding mufflers

none

i have a 302 in the cougar headers 268h comp cam torker intake holley 600 roller rockers and i want flowmasters but not sure if i should get 40 series original flows or 40 series delta flow i want it to be loud not quite i dont care about interior sound it can be loud email me with a suggestion thanks jj fordmuscle668@wmconnect.com

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trush glasspacks

durable, well built, lifetime warranty, deep, performance sound, made my V6 car sound like a V8

None

Hey, when my muffler first cracked I wasn't sure what I was going to replace it with. After looking around and getting some people's opinions I decided to go with the Flowmaster 40 Series. Now I only have a 3.1L V6 with a true dual exhaust, but these mufflers sound amazing. They make my car sound like a V8. And for only $300 for both mufflers and installation it was a great deal. In fact, the second day after getting them installed I actually set off the alarm on a parked car. That was fun. These mufflers sound great and are built to last a long time. Plus the sound at idle is great, even then the Flomasters make a deep rumble. I would recommend them to anyone that wants a deep, loud sound to their exhaust. And if you have a V6 and are unsure if these will sound good, trust me they do. My Grand Prix is proof of that. I've only had these for a few days, so I can't wait to break them in and get an even better sound.

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Only the stock mufflers. There is no contest, these are a hundred times better.

Aggressive sound, but not too loud inside the cab. Increased power. Sounds awesome when truck is started!

None

I just replaced the Gibson muffler on my truck with a 40 series Flowmaster and it sounds ten times better! The Gibson sounded like stock, only a little louder, but the Flowmaster sounds tough!!! Now the sound matches the looks of my truck. I also noticed a slight improvement in acceleration and passing seems easier on the highway.

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Stock, Gibson