Hey guys figure yall could steer me in the right direction for some more power out of my 99 si without having to do a supercharger or turbo and loseing my fuel mileage. This is what i have done so far Comptech cold air intake dc stainless header to megan racing test pipe to Comptech cat back exhaust and skunk2 short throw shifter. I have heard to add a vtec controler and maybe timing gears. but that all ive seen so far without going into my motor. Let me know some good bolt on adds for more power and fuel mileage also should i do anything to the ignition i am a chevy guy and i bought this car for good fuel mileage and something fun to play around with. Any help and pics brands and also whats the best timing to set my distributer too. Thanks in advance know its alot of questions just wanna have mine running the best she can!

 

Without boost? Without sacrificing fuel economy? Not much really past what you've done already. You can get a car turbo'd RELIABLY and still maintain good gas mileage as long as the tune is pretty good. A VTEC controller is a waste of money.

Check section 4 the FAQs.