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what size pipeing is better 2.5 or 3 inch for about 300rwkw.

Big problem in the industry.Every one wants big pipes big throddlebodies big intercoolers.Our opinion they are going backwards.We did heaps of testing with Jim at Croydon Racing Developments in the early nintey's with intercooler piping,with some surprising results.The fact is performance is torque and horspower, not just horspower. Each car is individuly modified and it is a black art to perform the set up.Thats why it is best to stick to the reputable shops with years off experience.

At Plazmaman our research is never ending.

To answer your question 2.5 inch piping should flow app 650hp, taking into concideration how many bends,center line radis off bends and where the bends are situated plus a few other factors.

Cheers Oyay (plazmaman)

thanks for all the links and suggestions guys, very helpful.

Anyone know what the TD05/06H twin turbo kit is rated to? That is what the cooler ronin linked is a suggested use for.

I can get that cooler for ~2700 from greenline delivered and including tax.

I will check out that apexi cooler..

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