[sprl67]

2004 v6 3.9L CAI? I've checked up with BBK and they don't recommend their CAI for my '04. I know its not the 3.8L and apparently something to do with O2 sensor. Anyone got some advise?

[GuitarstarX7]

Most will work from 99-04. I got a MAC intake and it works really good but it is kinda expensive

[nigel]

Welcome to the site.

[Markstang690]

i believe any of the CAI's for the 3.8s will work fine for the 3.9s the intakes and such are all the same only difference is the crankshaft

[sprl67]

The MAC cai looks good. Thanks! About how much HP gains to be expected from the combo of the Throttle and CAI? I believe this combo will be my first add and then a true dual exhaust. Perhaps chip after that.

[ESG-642T]

any 3.8 CAI should work, I would not suggest the throttle body right now unless you have a huge modification list.

Gains would be 1-5rwhp.

[ewells2420]

indeed. There is no difference from the 3.8 to the 3.9 except a very small gain of .1L. Other than that, the engine is exactly the same.

[sprl67]

Any advise on underdrive pulley. I had a couple of shops recommend.

[jkmiller87]

I had an 04 3.9 and I bought a K&N CAI. It was expensive but added a few horsepower. It was about $250. I am about to put a generic CAI on my current 04 3.8. $59.00 for this one on autogrimmig.com