jon,
yeah, i should have revived this thread.
i got an email from john tippler no less (it was his car). i can't locate the email at work (i AM working here), perhaps i have it at home.
from my (limited) memory i believe he said that in his opinion the gain was from the exhaust and chip. personally i dont think i could live with that setup (you seen what h & s charge for that!).
as others have said above i should think you'll get 8-10hp from a new chip. i think amd take the time to dial it in properly to get the most out of it - thats probably where the real gains are. another 4hp with a sports silencer. (and 8hp on top of that if you've got a cat. and replace it with a presilencer).
i was all set to take my car to amd for setting up (suspension), and maybe have the hot wire kit fitted - but amd did not like the idea of their hot wire with a turbo (which is what i ultimately want) so i dropped the idea.
oh, btw, great magazine. do you know they never printed the article. can you believe that after the statements they'd made.
if i find that email i'll dig it out.............