ahmsg420

Okay so I just ordered a Megan Racing Axleback exhaust because I loved the sound and loved the price even more lol. Now I know that axleback exhausts are generally designed for sound/looks and not so much for performance, but is there any way to still create a well flowing exhaust system overall that would offer some good performance gains? For example, if I were to add some high flow cats would that help me get some more HP out of my car?

ahmsg420

anyone?

RaulGCustom

iTrader: (50)

You should talk to Greg Lecewicz on this forum.
He's got a lot of ideas

RedG37SNC

A bit late now.. your best bet would have been to go with a full CB that's got dyno'ed results. Nobody's even done dyno's on axlebacks, Y-pipes and HFC to compare or say... you're on untrodded territory here

To proceed you'll have to be willing to do before/after dynos and buy parts to test. Free flowing is not the goal, tuned is. Not to mention to really see gains would require a tune as well.

G37HKS

get resonated test pipe

B L U E S L A T E

iTrader: (2)

I was just about to pull a "do the Greg Lecewicz mods"... but I guess I was a few steps too late.

wlmngtn

iTrader: (9)

IDK how well you can trust that Greg guy. He seems to have toooooo much free time on his hands. lol

ahmsg420

uncharted territory huh? sounds challenging
I'll probably need to read up some more on exhaust systems in general (since im relatively new to this) before I do anything else though.

lol and isn't this greg guy the dude that drilled a bunch of holes into his exhaust? I don't know if you all are being serious here or if I'm just not picking up on the sarcasm...

ucla bruin

iTrader: (7)

I would change it out from back to front.

Muffler, mid-pipe, y-pipe, cats. Have read that it's better to open it up from the back to front if you do it by section so you don't make it free flowing in the front then restrict it with OEM piping towards the exit.
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ahmsg420

aren't midpipe and y-pipe the same thing? sorry im still new to this

ucla bruin

iTrader: (7)

Not the same. Check out some picture of exhausts on the forum. The order goes:

Engine -> headers -> cats -> y-pipe -> mid-pipe -> muffler
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ahmsg420

ohh okay...thanks a lot man

Harley'sG

iTrader: (7)

Test pipes...stay away from HFC's, especially Berk...I hope you don't pick up on my motivation here

ucla bruin

iTrader: (7)

No problem. I forgot to mention that some after market exhausts don't use the y pipe design. They replace it with an X pipe (ARK) or true dual (HKS)....etc It's the same section though, which connects to the mid pipe.
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ahmsg420

I just read up on that a little ago, thanks for clearing it up also. By the way, would you happen to know what the most restrictive part of the OEM system is?