Driftmotion.com sells do-it-yourself ic piping kits and some nice intercoolers that you can choose from
. Most ppl on here make thier own kits I think (That's what I'll be doing on my rebuild.). The best part of that is you can run the IC piping through the old intake hole by the passenger headlight and reduce the amount of bends in your setup and add a little more ponnies compared to the hardpipe kits that are sold. And before you ask, no, it's not hard to do, you just need an imagination on how you want your pipes to go
.
BOV's: Depends on what you are looking for. A fast reacting BOV is the HK$ SSQV. A BOV that will get rid of the most air in the least amount of time would probably be the Tial BOV, but it's slow to open. Some ppl use both HK$ and Tial in tandem. The HK$ would open quickly to get rid of the low boost pressure's and the Tial will open on higher boost to dump the excess compressed air into the atmosphere.
Turbo Timers: I've heard of some problems with GReddy timers, I have a harness for the timer and I plan on getting the HK$ type 0.