I originally had done a Cat back exhaust and Intake...I noticed some power with just the intake. I just added the HFC's and my car was running a little rough and lit up a check engine light. I had it tuned and the car runs much better. Very smooth acceleration, no check engine light, and better fuel economy.
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HKS HI-POWER EXHAUST|Stillen Gen 3 Intake|Berk HFC|UpRev tune|Swift SPEC-R Springs|H&R Spacers|EVO-R Lip|EVO-R High Wing|SPC Front/Rear Camber Arms|Hardwired Escort 9500ix
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