[wootwoot]

Tomei would be looking to improve upon stock design.
Keep the faster spooling/response of the stock turbo manifold and gain some power OR get the Full-Race which will have slightly slower spool/reponse but much higher power potential.
Tomei=drifting/roadcourse/people concerned with spool

Full-Race= anyone who wants to make as much power as possible on a bottom mount manifold.