im buying my old series 2 back but am looking for around 280 - 300 bhp and would like to use it for track and 1/4mile it already has adjustable tca's and toyo t1r's but i would like to know what else is going to get the power down without taking too much performance away, i am alrwady sourcing a quafe atb diff and toyo 888's as i know theese will help, Thanks