18g's are nice turbos for these cars 20g's from what i have heard spool a little late on the ej20 i myself run the vf34 and prduced 302.3 whp and 285 torque at 21.4 psi so really it all comes down to you, you can also produce the same numbers that i did on an fp16g or an evo III big 16g but i love my vf34 and besides it is ball bearing
