, ive started modding my new age now and would like sum rough figures on bhp please, so far ive got the turbo xs type h rfl, im having a turbo back 3'' exhaust with just 1 silencer done on tuesday and maybe sum cone filter or even panel filter, without mapping it what bhp will i get from the above modds?? im hoping for about 250bhp, also if i fit 1 of those copper valves to increase my boost to 15psi what should i expect in bhp?? il be getting in mapped within the next month or so! many thanx peeps

 

forgot to mention its a 02 plate wrx new age!

 

hi, to be honest you will not gain hardly anything without the remap, then you should see 270-280bhp

 

Not quite true, a WRX with a decent sportscat exhaust can put out around 240bhp without a remap.