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Old 05-09-2005, 08:25 PM   #1
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Exhaust Size

I was wondering about the size of the exhaust and it's compatibility with a turbo kit. I have read that having a 3" exhaust/flex is ideal for a turbo setup. The question I would like to have discussed is about having a 2.5" exhaust/flex setup. Would a 2.5" system work well with a turbo setup and how much performance would that "take away" compared to a 3" setup? Thanks in advance.

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Old 05-09-2005, 08:33 PM   #2
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if u already have the 2.5 it wont be worth it to upgrade to bigger. 2.5 flows just fine unless you want to push something like 12-16lbs or higher.
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Old 05-09-2005, 08:48 PM   #3
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2.5 will work, BUT 3" does better. The whole idea is to get the hot exhaust gases away from the turbo as soon as possible Less restriction means more flow, more flow means faster spool..............
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Old 05-09-2005, 10:45 PM   #4
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Thanks for the replies. Reason why I'm asking about the difference in sizes is because I'd like to upgrade my exhaust before I get the turbo system. Though if something comes up that doesn't allow me to buy the turbo when I'd like to get it, I don't want to have an exhaust system that will end up losing power. I've read that having a 3" system on a N/A system will show poorer performance. So I'm looking to see if getting a 2.5" system would be a nice setup to go with to be on the safe side of things. Thanks a lot!

Cheers!

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Old 05-10-2005, 06:07 PM   #5
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3" wont hurt performance if you stay N/A for a while. I ran mine for 3 months before taking the car to Tom's, as soon as I pulled out from the muffler shop there was a noticable difference between the 3" and the 2.5" Magnaflow that it replaced. In the end it all boils down too what YOU want
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Old 05-10-2005, 10:22 PM   #6
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I just want to get this straight. . . so if I decide to go with the 3" Exhaust/Flex Pipe and it turns out that I wouldn't be able to get the turbo, the 3" setup would be fine for N/A right?

If it would turn out that I wouldn't be getting a turbo and I had the 3" exhaust, I would also upgrade my header as well.

Cheers!
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Old 05-12-2005, 03:45 PM   #7
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3" is way too large for NA, 4 bangers need the back pressure to help with low end

I have a 2.5 and im doing about 15psi on my turbo setup.
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