I have 1999 Nissan Maxima and I want to increase the horsepower. I heard that cold intake increases the horsepower by 10-15. And also by buying a ECU chip. But ECU chip is expensive. IF you know another way I can increase my car's horsepower please let me know. I appreciate your opinion. Thanks

1. Cold air intake

2. ecu chip (I agree.. really expensive)

3. change exhaust

4. change heads and cams

5. turbo charger/super charger

6. intercooler

Also, you can buy aftermarket parts for your body to make it a bit lighter, thus more speed.

However, overall, all this will only raise your hp by about 30 - 40... maybe, and this is after thousands of dollars.

I suggest you do some research, find out which parts will fit you best, and what parts also fit your budget.