sup gotta couple questions about bpu's.
1. do you need to get stage one bpu before stage 2 3 4 etc.?
2.if i install a bpu on my tt and later convert to single turbo do i need to install a different bpu kit?
3. bpu+ does each plus mean a different stage or the plus means bpu kit with upgraded features that arent part of the bpu kit? or each plus means one of the bpu kit aprts has been replace with a better one?
i apreciate any input. THANKS!
-Frankie

A stage 1 BPU consists of a:
1: Downpipe
2: Greddy BCC
3: 3inch exhaust
4: Turbo Timer
5: Boost controler

after that the Bpu + come into handy heres the stages.
Bpu +: Thats the stage 1 with cam gears this yelds up to about 20hp

Bpu ++: This is stage 1 with the cam gears and the addition of pulleys this gives about 5-7 hp

BPU+++: Is stage 1 with cam gears pulleys and a FMIC (front mount Intercooler)

I would recomend to do the stage 1 then FMIC then cam gears.

Yes you can keep all your BPU once you go single but if you go big single like a 67mm turbo and up I would recomend to get a 4 inch downpipe and exhaust. I hope that answered everything if you need any more help dont hesitate to PM me.

suprastore.com has a good BPU kit.