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About to replace my alternator for the second time on my 2003 V6. Got it tested the other day and its only putting out between 11-12 amps at idle - I'm told it should be doing 14. Sometimes it seems to work fine, but other times when I'm sitting and idling I can watch the voltmeter drop quite...

I was looking at new tires and am on a budget. I know stock for a 2003 v6 Mustang is 225-55-16; what I want to confirm is that a 225-60-16 tire (the ones I'm looking at are like 15-20 dollars a tire cheaper!) will mount on a stock rim and on the car. I know the car will sit slightly higher and...

My car was in desperate need of new tires, especially for the winter season. So I researched a bunch and found a nice set on TireRack. I wanted to go with wider tires on the car so I ordered 245's for the front and rear. I got them in the mail yesterday and they are HUGE. I know that they...

I <3 my Mustang. I just got back from a night of messing around on a completely empty highway with a 93 Camaro, and an S10. It wasn't much competition but it was just so fun (aka. smoked 'em). I don't ever want to own something thats not American nor a Mustang. :SNSign: :) :) :) :) :) :) :)...

I have a crappy Cold Air Intake kit that I got off of eBay for like 25 bucks plus shipping, which started to rust. I want to upgrade to the K&N FIPK one. When searching on eBay I found two K&N ones for the v6 (mines a 2003). Is there any difference between the two(link below)? I'm gonna get...

I just installed the Performance Tune on my DiabloSport Predator for my 2003 Auto. V6, and damn its awsome. I feel some more power at my disposal, and my tires are chirping when at WOT going into second. I've gunned my car plenty of times and thats never happened. I'm probably not going to...

Will getting the intakes ported kill fuel economy?

I've been on Stangnet for a while now, but never in "Sound Shop" so I dont know if anyone every asked this question. I have a 2003 V6. I purchased a used Mach 460 set up off of ebay. It came with the rack in the back, amps, door speakers and door tweeters, but now wiring, or the tweeter...

I bought a Cold Air Intake System off of ebay a few months ago (which is acutally rusting). It came with a cone filter. Will getting a cone filter with an "open mouth" like in the link below make more power, be worth while...

Most people want to swap the 3.8L V6 out for a 4.6L V8. I was thinking about swapping out my 3.8 for 3.9L DOHC V8 from the much overlooked 2003 Ford Thunderbird. HP and Torque are pretty impressive at 280 and 286. I know that the T-Bird only came in automatic and my car is automatic as well...

I was looking into buying new Rims/Tires and found some 2005 Mustang GT Bullit Take Offs with 2 miles on them. I enquired about them fitting on a 2003 Mustang and they said they would require spacers becuase they would rub at some point. They said they wouldn't recommended spacers. What are...

What effect does swapping in an aluminum driveshaft have on the performance of a Mustang? I assume its lighter, would that mean better acceleration, gas milage, ect.?

Will Front and Rear Sway Bars from the same year Mustang (03) GT fit on a V6? Are they simple bolt on mods and do they make a worthwhile difference to get? Thanks.

Anyone install the chin spoiler themselves? I'm ordering one from a place and they said that it does not come with any hardware. Do you have to drill into the body of the car to get her on? They said all you might need is simple sheet metal screws or something? The Chin Spoiler looks badass...

I have a 2003 V6 with a Dual Borla Side Exit Exhaust system. The only problem is that its not a true dual set up, it goes 2 to 1 and then 2. It hooked up to the y-pipe. I hear its VERY restrictive becuase of the turns in the pipe. I want to make it true dual to get a better flowing and sound...

What is the stock rear end ratio on a 2003 v6 Automatic? Anyone using 3.73's on an AUTOMATIC? Hows gas milage around town and highway? Anyone using 4.10's on an AUTOMATIC? Hows gas milage around town and highway? I wanna upgrade to t-lok and a new rear end ratio but dont want to kill...

Anyone know where to get the gasket and filter needed for the v6 automatic transmission online? Thanks alot.

I just ordered these U/D pulleys yesterday: http://www.rpmoutlet.com/musv6asp.htm Has anyone had any bad experiences with them? Anyone have any charging problems with the same set i bought? I heard that you need a "pulley puller" to take off the stock pulleys safely. Anyone have any...

I've been reading alot about the DiabloSport tuners and such for the v6. Has anyone used one, and what kind of power gains did they get? I know you have to run 91 octane fuel in order to use it. If you run a higher octane fuel does it effect your fuel economy at all? I'm not really...

Someone is selling a ported and polished 2001 throttle body. I have a 2003, is there any difference in the throttle bodys between those years? Will it be a direct replacement? Anyone ever install a ported throttle body on a v6? I know it doens't do much unless you've got your intake...