Price: $200.00
Pros: Good sound Good HP boost
Cons: Hard to sneak out
Recommended? Yes

Comments: I got this super 44 exhaust a little while ago and have been super happy with it ever since. It has amazing sound at start up! and the idle sound very beasty. I have a 5.2 liter v8 so i recommend it on the engine i havent heard it on a straight six or inline 4. I would definatly get one if these if you dont have one. When im at a stop light and i punch the gas you can hear my car down the street.

Price: $230.00
Pros: loud as all hell with that staple "flowmaster sound"
Cons: With a cat delete, the droning can be a little annoying on the inside, in mid-second gear, but other than that, nice and quiet.
Recommended? Yes

Comments: * PRiCE STATED WAS FOR THE TOTAL INSTALL VIA LOU'S CUSTOM EXHAUST, NORTH READING, MA* The build up was: removed collector precat (precat delete pipe) stock cat 2.50" mid pipe, flowmaster super 40, 2.50" open bent tailpipe, to a welded 4" magnaflow chrome tail truck tip.

Price: $240.00
Pros: Less airflow restriction, Louder sound (Haha),
Cons: Sometimes can be a little to loud at night....say at like 3 in the morning
Recommended? Yes

Comments: The only reason my exhaust is loud is due to that i took the cat-converter off so it goes straight from the Y-pipes to the muffler and out either side before the back tires. Overall I'm very pleased with it. I do recommend getting a K&N air filter as with any new exhaust system could screw up your gas mileage. And if you don't want it extremely loud, then keep the cat-converter (whatever brand you prefer if you don't want a stock one)

Price: $90.00
Pros: sounds great
Cons: non so far
Recommended? Yes

Comments: sounds great, nice deep sound

Price: $79.00
Pros: great sound, good price
Cons: none
Recommended? Yes

Comments: I got this muffler put on when i found out my stock one had a hole in it. I love the sound of the v8 with this. What i love about this muffler is that its loud outside the jeep and when accelerating, but while traveling at highway speeds and cruising, the muffler is not anymore noticeable than the stock muffler. great muffler

Price: $100.00
Pros: Looks great and sounds amazing.
Cons: None.
Recommended? Yes

Comments: I have this muffler in a 2.5 inch exhaust with headers and a high flow cat. This setup leaves for an absolutely amazing sound. At low RPM it sounds like a small V8 or diesel inline 6, and in the higher range sounds like a $200,000+ exotic such as a Maserati or Lamborghini.

Price: $50.00
Pros: great throaty sound.
Cons: weld in recommended.
Recommended? Yes

Comments: I love the sound.

Price: $210.00
Recommended? Yes

Comments: For starters if all you want is sound this is a 10. It gives the 3.8 a little growl across the rpm range. That being said performance gains were minimal so as long as you don't expect to much in that category its a good buy.

Price: $200.00
Recommended? Yes

Comments: great! not to soft. not to loud. it rumbles when i start it up, nice on the highway. girlfriend approves hahahaah

Price: $200.00
Recommended? Yes

Comments: did away with it and now just have the straight pipe all the way. Like it much better............................................ ..........................................

Price: $90.00
Recommended? Yes

Comments: Good rumble. Gives the Jeep that grunt sound that I've been looking for .

Price: $110.00
Recommended? Yes

Comments: the best thing i ever got
its so loud
and awesome wouldnt ever get anything else
extremely satisfied w/ it

Price: $65.00
Recommended? Yes

Comments: Excellent sound even on the 4.0, as expected. Gotta love the Flowmaster. Didnt feel much power gain though.

Price: $80.00
Pros: Doubles as a skidplate. sounds great
Cons: Increased resonance inside cab, not bad at all though
Recommended? Yes

Comments: Used to run a 2.25" 40-series delta flow with no cat on my XJ. Had a very aggressive tone, but droned pretty bad in the cab.

Decided my TJ needed some sound, so I deleted the catalytic converter, and put a FM Super 40 2.25" muffler in and attatched it to the stock tailpipe.

The tone is not as aggressive, but the interior resonance is so much less than a regular 40 series.
Sounds better than any cat-back I have heard.

Pros: Durable, great sound, better performance
Cons: none for me
Recommended? Yes

Comments: Love the Super 40 on my JK. I have used Flowmaster on almost every vehicle I've owned because they are bulletproof and give me the sound & performance that I like.

Recommended? Yes

Comments: My jeep sounds great now that i have a flowmaster 40 on it. i was running no muffler for awhile and with it i have more torque

Price: $98.00
Recommended? Yes

Comments: Can drone at times under 2000 rpms but has a nice deep sound for the money.

Price: $50.00
Recommended? Yes

Comments: sounds awesome but i love LOUD! and its not haha. but it does sound awesome

Price: $90.00
Recommended? Yes

Comments: not very loud. chopped the pipe off 6" after the muffler and i couldn't be happier with the sound i got out of it. lots of looks and compliments.

Price: $109.00
Recommended? Yes

Comments: Great on the 6cyl, meduim low end tone but definatly does not sound like a ricer.