lots of good points there Kev, 35r.... lol ,your just a big boost junkie :) major one being at 400 hp you will have traction issues , some who run 300`s cant grip on some days. toyo 888`s are a big help ( jim and his 12`s 1/4 time prove this ) . 300hp see`s you with the 911 , and 400+ see`s you pull from the 911 300= minor internal upgrades 400=lots of upgrades everywhere.