Flow of standard UK MY99 heads?
 

Hi all

Does anyone have flow figures for the standard UK MY99 turbo heads?

Thanks :thumb:

I have flow data for the 99/00 Head casting and 01>STi (Small Port), but it cost me money to get ;)

The standard 99/00 Casting is pretty good, but UK/WRX cams aren't great. - I've always found that they struggle circa. 420hp. STi cams and valvetrain (in the same head casting) should see you up to around 500hp with a suitable turbo etc, no problem.

Thanks for the info. That's some pretty good flow potential going on there then for a 200bhp engine! Makes me wonder why Subaru made the ports flow so much.