What exhaust manifold flows the best??

[4G63 For Me]

I used the search function, but nothing seemed to really answer my question. I know for intake manifolds, there are flow numbers associated with them, or a lot of tests done to see which puts out the most power on identical setups. Is there something like that for exhaust manifolds??

I'm in the market for a new turbo and am wondering what type of exhaust manifold I should run with it. I'm using the stock 2G right now. Should I get a Turbonetics T3/T4 manifold? A SBR ported manifold? Or just port the hell out of the 2G I got now? Which will flow the best? I realize I have to get it to match up with the turbo (T3/T4 manifold for the turbo, Mitsu manifold for Mitsu turbo, etc), I just want to know which flows the best.

My apologies if this question/topic has been discussed. If it has, just point me to some threads and I'll read up on my own. Thanks!

 

[phatTSi]

I know 2 guys making around 600whp (607.8 and 540) and they are still running the 2g ported manifold.

 

[1badtsi]

well obviously a tubular header is gonna flow the best, but like he said you dont need anything but a ported 2g

 

[14.5 drift]

SBR has a really nice cast mani, spodsed to be just as good or better than the tubular manifolds, and for only 3 bills.

 

[gixxer]

...all of buschur's cars run ported 2g manis with HKS wastegates attached to them.........some food for thought

 

[azkikr10]

has anyone done any sort of tests to see if slowboys manifold outflows the dnp manifold?

 

[gixxer]

honestly, who cares? its not going to make a big enough difference to notice unless you are making a rediculous amount of power