chet123

iTrader: (7)

I own a blob type UK STI on a stage 1 upgrade. Am thinking of doing some additional mods, is a Harvey Up-pipe and headers a worth while upgrade?

I believe Harveys are the best, is there any other specialists anyone can recommend.

billy21

iTrader: (4)

Harvey is meant to me the man for them but think you need to have it mapped once done iirc

daijones

Harvey's the expert, his ported headers and matched up-pipe should help greatly with spool. No need to worry about more exotic headers until you reach 400bhp

chet123

iTrader: (7)

is it a worth while mod not looking to run anywhere near 400. Just looking for a little more power, torgue, better turbo spool up and responsiveness. I've now spoken to Harvey and he has been most helpful.

Just wanted to see other peoples opionion on this mod. I think the problem I'm finding is the type uk STI has a standard dect up-pipe from factory so can't see that being a worthwhile upgrade.

daijones

I'm very happy with my up pipe and headers from Harvey. Had them fitted at the same time as a VF35 to my Hawkeye WRX so I can't really compare before/after just for the pipes, but after a map the VF35 spooled up only a little slower than the standard TD04 (a notably fast spooling turbo) mapped by the same mapper, but of course gave a decent bit more power. There are before and after graphs here: http://tinyurl.com/d5vvdem though remember that's comparing a mapped TD04 with milltek and filter against the same with both harvey's pipes and the VF35