I am piecing together a turbo kit for my car and im trying to decide which mani and DP to go with. My original choice was inline pro mani and a 2.5" DP since im going to be on low boost (7-9psi) on a b16 with stock compression and ctr cams. I was wondering if the neukin package would be a better choice since it is equal length but the thing I don't know about is if I should go with the 3" DP? Would that go good with my set-up? Also what kind of mods would I have to get to my exhaust/test pipe to run a 3" DP? I have a 2.5" test pipe with jdm flange and Greddy evo just for mention.

 

anyone?

 

If you are going w/ a 3" DP, then go 3" all the way, don't use the 2.5" test pipe.

It is better to go 2.5" straight thru or from 2.5" -> 3" system than 3" -> 2.5" system due to flow, back-pressure, etc, etc.

I don't know about your case, but my car (240sx) has a hard time if I do a complete 3" system because of clearances, so I'm going from a 2.5" -> 3" dump pipe transition to 3" system.