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View Full Version : Are flex pipes worth it?



90ToyAllTrac
06-02-2010, 08:21 PM
My old exhaust that i will be replacing has a flex pipe on it. Do this things actually help anything? Wondering if I should put it on the new exhaust system or try and sell it used. I doubt Im going to be doing enough extreme driving to worry about cracking my pipes.

Thanks

Grot
06-02-2010, 08:24 PM
I havent had flex pipe on two of my cars and never had an issue, just make sure you exhaust is well mounted

Mafix
06-02-2010, 08:51 PM
yes you need a flex pipe.

Hookecho
06-02-2010, 09:09 PM
^ i agree. our motors rock back and forth and that flex pipe allows the exhaust pipe attached to the motor to move with it.

4thgenceli
06-02-2010, 09:55 PM
^ i agree. our motors rock back and forth and that flex pipe allows the exhaust pipe attached to the motor to move with it.
Now what if we have solid front/rear mounts installed? Does that still matter?

Hookecho
06-03-2010, 12:03 AM
no, if you drive a boosted go kart then don't worry about the flex pipe. :hehe:

90ToyAllTrac
06-03-2010, 03:29 AM
These posts are rather contradictory, how about stock exhaust with regular rubber hangers, and average street driving?

METDeath
06-03-2010, 03:36 AM
Unless you seriously solidify your motor mounts, the motor will rock back and forth naturally. Which means... you want flex.

joe's gt
06-03-2010, 04:16 AM
better safe than sorry. Flex that sh*t

Sang
06-03-2010, 04:20 AM
FWIW - my downpipe cracked twice within a years time when I had my crappy exhaust with no flex. After the second time I got it welded, I braced the downpipe, then the mid pipe cracked a few months later...

Needless to say, I bought a new exhaust and downpipe that winter from KO Racing and it's been great for the past 3 years.

Funkycheeze
06-03-2010, 04:59 AM
Even with my solid motor mounts, I still use a flex pipe. The weight and vibration of the entire exhaust system rocking on the turbo outlet flange, despite the rubber hangars, has a bad habit of causing cracked exhaust housings.

Better safe than sorry.

v8killer
06-03-2010, 09:47 PM
you can use a short one and its not like it will be a major flow issue, even with a "3sgte go cart"(witch if taken litterally would be incredibly awesome) the exhaust still expands by a certain dergree and the exhaust hangers will reach their limit and cause a little stress but over time it will take its toll and m dp cracked once already. do it