I think the 9.5 was either flywheel or with ice on the intake

 

This is what it said on the sponsor's website. But what they base it on is not discussed. I'm semi-pleased with the product. It wasn't hard to install but for what it does it could be a little less expensive. I can always put it back the way it was and sell the MAC. I'll see what happens Tuesday with the next round of mods.


"MAC Cold Air Intake for 1999-2004 V6 Mustangs

MAC Performance has rated this cold air intake system to add 9.4 HP to the rear wheels! This product is a complete Cold Air Induction Fenderwell System. MAC Performance is dedicated to building products that meet strict quality standards and is the industry leader in cold air induction systems."

 

I got a mac too they said 8 somethin hp for a 3.8 was prolly like 4 or 5

 

[sm=bustedsign.gif]Hey spirit, I think you got one of those 3.8L V6s not a 3.9L, it will say it on either your intake or your fan, and your pic shows a 3.8L sticker on your fan, so you may want to change your sig. The only 3.9Ls were produced late in the year as a last ditch effort to sell off the last of the 04s to make room for the 05s, I talked to a salesman at Ford and he confirmed my theory. Its almost as if I were some sort of marketing major. Oh yea I am, ISDS, business administration major.

 

Actually my emmissions sticker says 3.9L and my VIN# comes up with the same thing. It is a 3.9L. Ford used these for only part of the year in 04 and only in the American Mustang. The next year in 05 they went to the 4.0L. Thanks

BTW .... the pictue you see is not my Mustang it belongs to the person who started this thread. They do have a 3.8L.

 

And it is hard to feel that 4 or 5 hp. But tomorrow will be the real tester ...... duals! Then headers. I have the headers but not the time right now to install them. Doing mods one at a time lets me see the steps of difference. Then I'll be doing mpg testing until spring. Who knows, I might just take it all off and go back to stock. Especially if gas prices go back to $3 plus a gallon. I think though that the mods I'm doing won't affect the mpg that much. Might actually improve the highway mpg slightly.

 

Believe it or not, but the mods actually help gas. Now the duals with headers may give you 10 hp, but I wouldn't hope for anything more. You'll feel a little more throttle responce, and you'll love your new sound, but still don't expect to turn many heads accelleration wise.

 

I know about the V6 vs V8 sound. I am from the old school when headers were easy to install. Sixers were in a row. Duals could be put on my anyone with a torch and a bender. Catalic Converters were new. Four barrels and a high rise, tracton bars and a four speed. Headers, glass packs and popper stoppers. 14" rims were all you could get. Everything came with gaskets and clear instructions.
Now its oxygen sensors, catbacks and catforwards, performance chips and tuning. Instructions can only be downloaded. "Contact Us" is a button that goes no where.

 

Thats HR&B's car, and I thought they ran out of 3.8's in late 04 and slapped windstar engines in stangs.

 

I believe you're correct about the Windstar engines. I know the 3.9 was going to be put in a van of some type. The 3.9 was produced in Winsor, Canada....So I guess I have a Winsor 3.9. I don't need no stinking mods...I have a Winsor.[&:]