I am seriously looking at buying a 99 Cl 3.0 and i would like to know what kind of hp increase u can get with common mods like i/h/e or ecu modifications. Also what other mods are common on the first gen 3.0 CL that work well for others.

 

Pure guesses:

headers = 10-15

catback = 5-10

intake = 2-5

I'm not familiar with ecu upgrades. There's the Venom 400 (I had one) and it did NOT lower my ETs at the track. I'm not sure if there's any HP gains. There's the UNICHIP which has yielded 10-20+ hp, depending on what mods you have.

Then there's N2O! 55-65-75-100 HP!