Flowmaster Dual Exhaust review--

Matt_ · January 19, 2005

Just wanted to let everyone know. I read a lot on this site and it seemed like everyone hated flowmasters. Well i just had a 50 series single in/dual out installed on my truck- dual rear exists (directly under each shackle). 2.5" pipes with 3.5" stainless steel tips.

All i can say is that i was dissapointed leaving the shop. It seemed waaay too quiet in the cab. My girlfriend followed me home and said how awesome it sounded.. i was a little confused till i had her take it for a spin while i stood outside and listened.

It's amazing, the sound outside the vehicle is awesome. Deep rumble that the neighborhood can hear- but not annoying. And inside- a nice mellow rumble that doesnt get annoying at ANY RPM.

To recap:

-Flowmaster 3 chamber muffler

-2.5" pipe

-muffler set as far to the rear of the truck as possible

-3.5" stainless steel tips under each shackle

-Very little noise in cab

-Excellent sound oustide

lrymal · January 19, 2005

....
-Very little noise in cab...

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No more "resonation" than the factory? You could handle a long long trip at about 1800 RPM with the new setup? Really am curious... thanks!

Black-Z71 · January 19, 2005

Yeah....I agree. I have had a 50 series on my truck for a couple years now, and I love it. Very little sound in the cab, unless you really get on the throttle when accelerating. Would def do it again...

Matt_ · January 19, 2005

lrymal,

Ill be taking it for a 2.5 hour drive this weekend. But there is NO resonating in the cab. You can hear the rumble when you get on the gas- but its a rumble, not a reonating drone. and it's never loud (except outside the vehicle... when i dropped my girlfriend off this morning, i got on the gas a little and her sister heard it inside the house )

But i'll stress this- the guys installing it made a point to put the muffler as far back as possible. They said because the CC is so long- it's often hard to keep the muffler under the bed of the truck. So if you get one installed, make sure they dont act lazy and throw the muffler directly under the rear seat- then you may get some droning.

mcreyaufmiller · January 20, 2005

I have had mine for 80k miles now. I drove it from Delaware to Orlando and back, no problem. The Flowmaster is mounted directly behind the cat and it gives a nice sound in the cab, and nicer outside. I love it and it does not annoy me at all. I love the sound, but then I am a Harley rider and love the louder pipes there as well!

lrymal · January 20, 2005

....But i'll stress this- the guys installing it made a point to put the muffler as far back as possible. They said because the CC is so long- it's often hard to keep the muffler under the bed of the truck. So if you get one installed, make sure they dont act lazy and throw the muffler directly under the rear seat- then you may get some droning.

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Excellent point! Thanks for the hint. This might be a project for me as well in the future. I hate resonation.

I don't understand why this wasn't an issue back in the "old days". Didn't our old cars resonate and we just not notice? Perhaps vehicles of the muscle car era just didn't have the advanced sound-proofing we have today and resonation was no different sounding than the normal noise.

Matt_ · January 20, 2005

Perhaps vehicles of the muscle car era just didn't have the advanced sound-proofing we have today and resonation was no different sounding than the normal noise.

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That's actually a pretty good question and the answer is quite complicated. Though im only 20 years old.. so i don't remember the "old days" as you speak of them- i am 2 semesters away from my aerospace engineering degree. last semester i took a class called "advanced equations for engineers". In that class we put together basically a million theories and equations; one being the "wave equation". In short, resonance is a huge part of engineering concepts today- partially because of comfort (hence quieter exhausts/our cabs) and the other has to do with safety.

Strange fact: on my ford explorer there was a TSB put out. An internal engine component matched the resonant frequency of the exhaust system which cause the exhaust to make wierd noises; like pops and groans. That's the same as saying an opera singers voice matches the resonant frequency of a wine glass- causing it to shatter... cool huh?