hi all i just bought a 2003 gts and would love to find out what different mods return in HP for ex: cold air intake adds x amount of horse power ecu chip adds? exhaust mods add? in other words where do you get the biggest gains for the least money. I went to a SCCA solo event yesterday ,and it looks like a blast so how do i compete?

 

Bolt-ons (exhausts, headers, intakes) tend to add anywhere between 5-30 HP depending on engine size and already installed mods. If you want to compete...expect to spend money on your engine.