Hi im running a 05 wrx

few mods
upgraded tmic
k&n induction kit
baily dv

but not sure which to go for my car is a 2.0

 

I got a 20g for my 03 WRX, kept it less than a month before swapping for an 18g - which is still on 3 years later. On a 5 speed box I was always in the wrong gear for the boost so would have to swap cogs half way thorugh an overtake. The 18g is perfect for the ratios. You will not be disappointed, it's a great little turbo.

 

with them mods go for an 18g.

you will need uprated injectors to get most out of 20g.

 

thanks for info lads