bro, u serious u wanna mod ur 4k ar???
why la?
anyway, before u do such a thing, please do the pro and con thinggy...and weigh both the outcome...
as rolla's opinion, it may be a better choice la, to go 4age 16v/20v, or supercharged...
anyway, whatever ur final choice it, it's up to YOU to choose...
let us know how ur project go...
cheers.
...and rolla, i really respect u dude...still on the 4k engine...
i got my ke70 and driven for a week or so...now cannot tahan :D ...wanna change engine lioa...but $$'s the issue... :D