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Well just got back from Unigroup in Girraween over half an hour ago as they have been flat out!!

Long story short, no good. Found a split hose on the run, the one that goes from the "twin turbo" outlet past the airbox...GRRRR

So I'll need to fix that before a tune can be sorted...Well, I'll have to go back there tomorrow and get back in line once I fix it :(

Yeah, just some nice cheap ones will even do as long as they are good quality. From memory, I'm pretty sure I had the exact same problem until I replaced it with a hard piping kit and even gained me some extra wasps.

Went with a cooling pro silicone black piping kit. Looks rough enough, and no more leak :)

Oil problem was a combination of rings not bedding in yet and lack of crankcase ventilation.

Once it was caned on the dyno blowby reduced very quickly. 312kw @ 16psi. 326 @18psi. Will go back in a couple of weeks for the power tune :) In the mean time it's Sau nats time :D

Dunno about Sean but with my HPI 3" dumps I got custom 3" to 3.5" front pipes made, couldn't find anything that big off the shelf

Custom pipes are the way to go , but aren't you still restricted by the turbo outlet ? Edited by NISSAN GTR

Mine are twin 3' into 3.5' front pipes as well with flex joint, then through a nismo metal cat.

Getting a 3.5 inch cat back stainless steel exhaust sorted out tomorrow as the HKS one is 3' from cat to 3.5 from the back of the resonator, then less than 3 inch through the rear cannon...

But you got 4L of engine telling that gas where to go lol!!!! gas has got no choice :D

The cross-sectional area of a single 3.5" pipe is about 38 inch square. The cross-sectional area of the twin 2.5" pipes is about 39 inch square. That gives equivalent flow.

Likewise, the cross-sectional area of a single 4" pipe back to muffler is about 50 inch square. And the cross-sectional area of twin 3" pipes is about 56 inch square.

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