big bad jon

hi folks, does anyone on here have any experience of porting their own headers?
has anyone written a guide on how to do it? that would be great!

Mongo

I guess it's more of a case of matching the ports, between the cast sections of the headers. I'll be doing my set soon. I might post a few pics up

myblackwrx

iTrader: (1)

I think Harvey ports them (posts on here as 'harvey' very helpful guy)

rob2006

iTrader: (1)

http://ken-gilbert.com/wrx/porting/p...t_manifold.htm

there you go! pic's to
Rob

Slowboy Racing

You need to Match the ports on the headers to that on the gasket, but don’t exceed the gasket line and make it a free flowing as possible.

GazJenno

Would you need a re-map after doing this or is it not major enough to cause any problems, obviously a re-map might get more out of it but would it do any harm to the engine?

Someone once told me a re-map was not needed for changing the headers to SS but not sure if thats right?

Cheers,
Gaz

Slowboy Racing

No a remap wouldn’t be necessary if just porting the oe headers, however to get the most gains from after market headers it’s advisable to be mapped

The Hoff

iTrader: (5)

Follow the advise as above for standard headers but if you are going to change to tubular headers then a reamp is advised. My map need a quite a bit more fuel put in to match the new air flow.

gillyz20let

i ported my own headers on my my05 and the only parts i could port was the ends where it met the heads as the rest was steel tube not cast.