Originally Posted by scoooby slayer

personally i wouldnt think twice about changeing that manifold, i think you would be pleasantly suprised at the gains you could get from a bigger turbo more top end power but still have the same or better response as your current set up.

my supra was open scroll but my r33 is semi twin scroll, turbo is twin scroll gt40r and that in itself is now old news, and manifold itself is twin scroll but wastegate is a joiner, the response is noticably different and apparantly the effects of twin scroll are even better on 4 pots.