Hcsi

I got 03 si like a month back and im feelin a low a response time in it..anyidea wut might cause this..plus would change my spark plugs and wires would help this..One of my friend told me that its best to go with NGK copper plugs but i thought platinum was better..so pls wuts best to go with?

Whiplash

have you adjusted the throttle cable??
it comes with a little slack in it from the factory

imported_chris_v2

i prefer copper plugs.

But bad plugs/wires will cause a mis-fire, not necessarily no power. But I suppose if you have high km a tune-up would most likely solve your problem.

imported_Nicotine

it's a honda. even though it's an SI, what do you expect from it?

plan on beating v8s? :P

imported_Kingjames1983

timing could be to far advanced but I do agree with ^
its a honda!