if you really wanna make ur celica faster...
- cold air intake
- full exhaust system (not just muffler)
- headers
- probably do some weight reduction for the car? like carbonfiber parts.
- lighter rims
- remap ECU.
those are the only way that i think you could bump up ur car's HP.. from 140hp probably with those upgrades it will bump you up by 25-40hp (witout ecu remap), wit ecu remap, expect more 15-25hp.
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