Don't waste your money on a cold air intake-they're worthless. You can chip it, as long as you don't have an automatic transmission. A chipped vehicle will burn out an AT within six months.

Read this article on changing the air intake.

http://ricksfreeautorepairadvice.com/col...

New engine with horsepower

Better flow air cleaner, headers, exhaust, intake.... Are all things that can help add hp.

Make sure you know the regulations of your state, if your state has car inspections. If you modify too much it may not pass. I would find out before you start to change things.

look into a different chip for the computer. it could be just that simple. it can change ignition timing, fuel ratios, transmission shift points and a bit more.

read this. If the engine is tired, a 99up 4.6 would be a good improvement.

I want serious responses, I want to know what I can do to my care to increase horsepower. I have a 95 Thunderbird LX with the 4.6L V8. Yes, I know it wasn't built for speed. But that's not what I want to hear. I just want help with things about what I can do to increase horsepower. Please give me good responses, I don't care to hear that it's not made for speed.