Which turbo?

[vikesfankevin86]

Ok so next year I am upgrading the turbos. My goal is to push around 21 PSI and I'm hoping that will get me around 500 RWHP? In a couple of weeks I am getting the SZ 3" down pipes. http://www.importpartspro.com/sz34boextudo.htmlI believe it is the 4 bolt that connects to the stock turbos correct? If that is the case I do not want to have to get new down pipes when I do my turbo. So I was looking at the Z1 GT600R turbos. http://www.importpartspro.com/z1gttukitni3.htmlIt does not say if it is a 4 bolt or 5 bolt but the impression I get is it can work with a 4 bolt. Do you think this is the best option for the set up I'm looking for?By the way it will mostly be a street car with occasional track time. It will be a weekend summer driver not an everyday or winter driver.Thanks again guys

[NolimitZ32]

the 600s are definitely 5 bolt, the biggest 4 bolt turbo is the JWT 500s/530s anything bigger will use the 5-bolts. if your planning on going with the 600s soon thenh dont waste your money on the 4 bolt DPs which will be useless once you go bigger.

[vikesfankevin86]

I would be fine with the JWT 530 because that will meet my goals am I right? But that is also a 5 bolt...so I guess maybe I could get a cheaper DP that is a 4 bolt until then...

[vikesfankevin86]

Or would it be more effective to spend the money on an underdrive pulley and wait for the DP until I upgrade the turbo. I wanted to do the DP because the transmission will already be out. Also the DP will make my car louder right? It is fairly quiet right now.

[car nut]

I vote 5 bolt dp's and big turbos. No UD drive pulley.