ive owned a redtop Astra for about 4 months now and i already can tell you its sh*t loads better than my old ecotech GSi. a few things have already been done to it like, 17" alloys, full stainless Decat, lowered.
but i really want more power out of the engine. was thinking of a racing manifold but i dont no how much or where to get one from. can anyone help me or advise me on the best mod's to get more power out of the car? thanks.