C.DUNCAN

Just looking for you're thoughts on headers and up pipes when thinking maximum spool? I'm thinking standard headers ported would be best on a 2.5

alcazar

iTrader: (2)

Depends on what power and what turbo. Mine runs a 2.5 with a HS TD05 20g. Harvey advised I could go with ported headers or tubular at that level. He had some tubulars going cheap, so I went with those.

WHICHEVER you get, have a word with Alyn at AS Performance and ask for a Harvey up-pipe...the better spool is noticeable.

C.DUNCAN

Well I'm going 18G I read that you don't need to consider the tubular headers unless you're going for the 400hp mark and at that they can still reduce spool. So that's what made me think porting the standard ones. Everyone does rave about the trick up pipe. Do you do get that in standard fitment? Or do you need to get the GT spec headers?

jake1989

iTrader: (4)

Standard fitment for Harvey trick up pipe. Try and get some used Harvey ported headers too ;-) bit hard to come by, but they do come up for sale. I manged to get a good set. Worth the waiting and hunting and small extra cost IMO

C.DUNCAN

Cool that's what I will lookout for then as im in no rush. Do they have to be 2.5 headers or are the 2.0 headers the same?

jake1989

iTrader: (4)

The believe the headers are the same for both mate

C.DUNCAN

Thanks for that 👍

rob84

iTrader: (5)

I run std header but ported myself and a std up pipe on my 2.5 runs at around 460bhp 500 ft/lbs

C.DUNCAN

Is that still single scroll?

rob84

iTrader: (5)

yes still single scroll mate on a garrett MD321t non billet

C.DUNCAN

That's nice figures with plenty torque :-)