there is no major difference between the 3.8's and 3.9's other than a slightly longer stroke they used them because they were going over to the 4.0 and had discontinued the 3.8 but had the 3.9's that were from the freestar/windstar all performance parts are interchangable and the easiest way to tell is on the fan schroud it it just says v-6 it is a 3.9 the 3.8's say 3.8 or you can look on the hood

 

The difference is so minimal that there is no difference in anything power wise.

 

Im from kearney, where you at?

 

That depends on WHO you ask. I asked the guys at American Muscle about a CAI, and they told me that performance parts are all specialty. Heads are different, throttle body angle is different, and they can't even do a tune for a 3.9L. I've gotten some emails from Super6 and they offer the parts you'll need.

 

woww i just ordered an intake, so now idk if its gonna work. which is it?

 

ok so, there is definitely a tune from american muscle available. the sct says it has a preloaded tune for the 3.9l v6. and for the intake all i need to plug is the iat sensor on the intake i ordered

 

you'd better call and make sure about that tune. I spoke to one of the sales reps on the phone, and he went and asked a supervisor, who supplied the info I'm passing on. Again, I was told they COULD NOT do a tune on a 3.9L. The guys from Super6 said there is no difference, and I figured if AM doesn't know enough about performance parts for my V6, then I would buy mine from someone who did.

 

What kind of intake did you go with?

 

the no name from american muscle because im short on cash still. works awesome, barely any mods to get it to fit. off topic but when am i gonna see that cobra, bro? lol

 

Maybe this weekend. I think I might going to the track on saturday, would you wanna bring ur car?