I have a stock 2007 Civic si 2.0 how can i cheaply increase horsepower

Asked by Jan 13, 2017 at 08:31 PM about the 2007 Honda Civic Si w/ Summer Tires

Question type: Car Customization

It is a daily driver but I want more power.  Reliability is critical so I need sensible info.  No turbo, supercharger, No2 info.  Cheap sensible power gains please.   

2 Answers

109,245

Intake and exhaust upgrades will gain you few HP and will not affect reliability. After that you get into internal engine mods which are not cheap.

292,805

HP is not cheap.

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