I've got a 2001 Targa that i bought with a 1 piece bi-turbo already on. I'm looking to do a speed kit next, looking seriously at the Airsal 44mm kit, then buying a bigger carb and intake kit. Another alternative is going for the raptor kit with the technigas next pipe. My question is if the technigas is a substantially better pipe than the bi-tubo? Also will the 1 pice bi-tubo even work with the outlined upgrades? I'm a bit of a novice mechanic, but a quick learner and wanting to get my hands dirty. Any advice greatly appreciated, thanks.