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Hi S666s! Ummm... first what size engine/cylinders do you have? After you got that, then look up getting a cold air or short ram intake for your car, header (ceramic or stainless steel), and then look up a cat back exhaust system for your year/engine/cylinder size... If you find and add all that stuff, you should hit your mark! Hope that helps! (i'm in the process of doing the same to my Accord!) PEACE and let us know how it went!

 

With normal bolt ons such as intake and exhaust 15-20 HP most likely won't be attainable. I would say that 5-10 would be more realistic. With an exhaust header added to the mix you'll get mighty close.

 

yea in my car i juss added a short ram intake headers and full cat back exaust with a test pipe and i can feel the difference im sure im pushin out 25-20 more horses than i started off with.
any thing to help. Payce

 

My friend got about 15-20hp with cold air intake, cat back and header on his 4cyl accord.