cheapest mod
 

Anyone tell me the cheapest single mod that will gain noticable power increase on my wrx sti 02

Dawes device

Dawes?
 

thick im fraid could you explain thanks

Hey, a Dawes device is a mechanical boost controller. By using a ball and spring mechanism it holds boost (to a certain manually set level) from the wastegate. Not only does this increase spool up time due to eliminating boost creep but allows you to change the boost level.

lightened flywheel ;)

It would be unwise to fit a Dawes device or similar GBE valve unless you knew what you were doing. You should also have a boost guage and reliable AFR guage in the car or better still, access to a wide band lambda. A knock link would also be advisable for such a mod.

Remap of the ECU by someone who knows what they are doing. It's cheap because it won't cost you a new engine in the long run.

F

Decat with CEL fix

How about a days driver training. That will help give a performance boost to any car you drive ;)

drive it off a steep cliff

for maximum gravity lid speed

or driver training or following racing lines on fast drivers on scooby runs

to learn how to make best progress