had chat to mark last night regarding MD series turbos headers and gearboxes-he is only 1 of only 2 authorised sellers for harvey's uppipe for gt spec2 headers-spot on advice-much appreciated
martin

 

i run one of harvey's gt spec up pipes on my car 3" sleved to 2.5" ported and wrapped.

the difference it makes is truly amazing (much better spool and a more punchy turbo).

i would reccomend anyone to try one, i got mine direct from harvey who is one of the most helpful blokes going.

 

from what mark was saying it knocks a few 100rpm off spool-nice! therefoe counteracting bigger turbo!
martin

 

I take it were talking about replacing the GT one with one of harveys own are we?

 

Agree with TingTong. Fitted Harvey's up-pipe last week to my 03 STI running an MD321H and GT Spec headers. Before and after dyno runs at Zen showed slightly better spool, but more significantly, a noticeable gain in mid-range torque and even a tiny extra bit of top end power. The biggest difference though comes on the road; much more eager to 'go' with more mid-range punch. Also the lag between gear changes is significantly reduced. I would say that Harvey's up-pipe is a MUST for anyone with GT Spec headers.

PS - just to make clear - I am not in any way affiliated to or connected with Harvey

 

I just had a look on Marks site but couldent see any prices what are the going rates for this BTW

 

Will be sorted very soon. Just recovering from the shootout

 

Interested, but more mid-range ?

Mine hits like a sledgehammer..... but I would like it to come in as early as possible ? ? ?

Price please Mark, ceramic coated too !

dunx

P.S. Anyone have an issues or did they re-map to suit ? TIA....

 

mine was £150 but it's wrapped not ceramic coated.

i noticed a big difference before my remap but the difference after is something else.

when i discussed the up pipe with harvey he reccomends a map tweek.