Wondering if worth changing headers, and if so what do people recommend. Sure I saw somewhere can gain up to 25 bhp?
Just curious really cheers

 

Depending on what BHP you want you could just port the original headers

 

Not really got a figure in mind, but was wondering on benefits etc, at what point do they need doing/changing or not as the case maybe. I mean will it be a gain regardless or could it cause loss of power/torque if not required

 

Benefits would be an earlier spool up,better pick up but I would say the actual bhp/torque gains wouldn't be huge but the actual driveability would improve.

 

What car / model / mods have you got ?

Shaun

 

Uk 2000 turbo
Panel filter res del
Rcm fuel pump
Rcm sportscat down pipe
Magnex 2.5pipe and back box
Fuel lab
Afp hybrid td04
V7 Sti tmic with y pipe etc
Ecuteked (JGM)
Think that's everything power wise

 

The AFP turbo can flow quite a bit of air, matching the headers and up-pipe to the turbo should improve spool and torque.

e-mail Andy and see what he suggests.

Shaun

 

i thought tubular headers made spool worse and improved top end

 

Tubular are only needed around the 400/450 mark, ported are good up to then, but always match the up-pipe to the turbo!

 

Asa above. Mine runs tubular with a Harvey trick up-pipe, now available from ASPerformance.
It spools early and pulls right up to the redline.

Around 400/400.