I don't know if there is a good answer for that question yet. I know it took months for anyone to improve on the stock '03 900 1M pipe. Might have to wait for these aftermarket guys to figure something out.Originally posted by grrandre
[br]what would produce the most hp gain on a 2004 fire cat 700 efi and on a 2004 zr 900 efi.
and please give me their web site #.