stealth_GT

Definetly a high stall torque converter, light weight aluminum drive-shaft and lower control arms. Especially if you drive around town a lot, it'll give your Mustang more grunt in the low end. Just icing on the cake for the when the M90 is installed. I should have done the TC/DS set up instead of wasting my money on other crap rofl

808muscle

16 and your parents got you a GT!! Well make sure you respect their decision by not doing anything stupid with their gift. Since you have an auto I would get the gears ASAP. It changes everything with the auto. Also, if you have not installed a CAI get the steeda unit. It works with the m90. A tune and cai will change that auto into a second and third gear burner. Money well spent IMO.

stealth_GT

Ditto.. 4.10s with CAI/tune worked wonders for my auto.

13.2/13.3 all day on street tires.

ikemikestang

Already got the CAI and custom tune in and yeah i think ive concluded that my next is gears than a ratchet shifter.

Blacksmoke

Put some Blower Cams on that Biotch.
Performance AND bad *** sound.

Whine and BLUB BLUB on idle.
DOOOO IT.
DOOOO IT.


Hey... DOOO IT.

REDBOSS1

First thing I did when I got the M90 was remove the 4.10's and I can say I don't miss them. I like letting the supercharger work.

Red-GT500

With the Auto your running 3.31 gears? If you bump it up to a 4.10 with the supercharger i dont think you would get the same effect as if you had say a 3.73, this would allow the car to not be retarded jumpy down low and still give it plenty of time for the supercharger to build pressure and not cause lost speed due to tire slippage in lower gears. If you were just going with some bolt on mods i would say 4.10 all the way but with the auto and a blower i think your going to miss out on the acceleration down low and be stuck spinning off the line way to much... just my 2 cents on that.

ikemikestang

So for now, should i get the 4.10s or just grab the 3.73 now and wait?

Mudflap

I still recommend the driveshaft first. With a blower, its hard to anticipate how you'll like the gears... personally, I'd wait on those until you see how the car is, then you can make an educated decision. Otherwise you run the risk of wanting to re-gear later, which is just more money. I've got 3.31s in mine, and will wait until I have the blower on to decide when/if I even want to do gears. The driveshaft is a great mod either way, I loved my shaftmasters on the last 09 GT.

Red-GT500

Mudflap is right, If your unsure then get the blower first. The general rule of thumb i have seen and heard with these cars is if your not using boost do the 4.10s if you are boosting use the 3.73. There isnt that much difference but the bigger the gear then the more your going to lose traction because of wheel spin. The 3.73 works well and also allows for a smoother acceleration. In my GT500 with 3.73 it still spins all the way through 3rd. I couldnt imagine having a 4.10 and losing anymore traction. However when the car finally does get grip it will accelerate harder with the 4.10s. With 500+ HP your not going to be getting much grip unless you have slicks.