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Has anyone here installed the ZL1 Add-Ons Splitter Extension? https://zl1addons.com/products/mustang-splitter-ext Is there a concern about it pulling the bumper off or deforming the bumper at high speeds on the track? Doesn't seem like it but some people have reported issues with products like...

Has anyone here installed the ZL1 Add-Ons Splitter Extension? https://zl1addons.com/products/mustang-splitter-ext Is there a concern about it pulling the bumper off or deforming the bumper at high speeds on the track? Doesn't seem like it but some people have reported issues with products like...

Hi all, I am wondering if anyone has run into this situation. I got a tune for a new CAI and subsequently got a revised tune for it. Yet when I try to load the file into the PCM the SCT device tells me that no changes have been made to the tune, do you still want to proceed with a full flash...

I'm losing confidence in my mechanic to do alignments anymore. They claim they cannot get my rear camber below -2? Anyone have recommendations on a good alignment shop that will align to your specs and not give you grief? Emphasis on lowered/modified cars would be preferred. Thanks.

APR Front Splitter. Who has it? Can you show me where you mounted yours underneath? Mine is not sitting flat. Also, did you take off the stock belly pan? Where are the most solid mounting points? I could use some help because I will be working on it this weekend. Thanks.

My driver turn signal light is out. Anybody know the bulb I should buy?

Hi all, I didn't really want to post this up here because I was troubleshooting myself. But I decided now maybe I should seek some advice. I did Steeda 2pc slotted rotors front&rear and GLOC GS-1 street pads and I am getting some noises. FYI I have the GT base 4 piston calipers up front. 1st...

Hi guys, Are there are any tuners that specialize in road course/autocross driving i.e. non-drag specific applications? I have a 6R80 auto transmission, which I know isn't as good as the manual would be for what I want. However, I'd like to see who tunes for this kind of thing. Let me preface...

Does anyone know what's needed if I change gears from 3.15 to 3.55 or 3.73s? I am Lund tuned. I emailed them and John says it may self-adjust within allowance with drive time. And that if not I need an NGauge or Whipple Flare tool. Some people say Forscan can do it, other say they've had issues...

I am considering swapping a 3.73 Torsen into my 6R80-equipped car. Who's done it and what can you tell me about it? Right now I have the base 3.15 gears and of course the Torsen won't fit the housing. 3.55 Torsens aren't readily available although I could always buy the 3.73 housing and swap...

This topic interests me and I thought I would take a poll on which S550 owners like best. Linear rate springs or progressive (or dual-rate). Leave a comment below as to what you chose and why. I ended up with linear springs because I like the predictability they have. But, there is no right...

Hi yall I have a question. I drive using Sport mode paddle shifters all the time. I noticed that after hard acceleration or other times randomly, the PCM will not cut off fuel and go into engine braking even though I want it to. It keeps adding fuel at the normal AFR and the car maintains...

I'm considering getting a GT350 steering wheel. Obviously I have to swap the electronics & stuff from my factory wheel to the GT350 one, including the paddle shifters. Has anyone done this swap who has an auto trans car? How hard is it for a novice?

To anyone who has done before/after, what do aftermarket toe rods ACTUALLY do for handling BESIDES providing more adjustability? Is it much different than the stock toe links? Just to be clear, not talking about the toe knuckle bearing, just the toe rods themselves. Thanks. Also, what is the...

I started thinking about getting a front splitter and a rear spoiler for my base 2015 GT. But there are a lot of pieces out there... I think I'd want the GT350 track pack spoiler but in terms of a front splitter its about finding one that is: 1) Functional 2) Looks good 3) Fits good Any ideas?

Just like the title says: I have 3.15 gear auto 2015 GT car. I want to put a Torsen T2R differential and Ford Performance 3.55 gearset. https://www.americanmuscle.com/frpp-34spline-88-irs-torsen-diff-1516.html https://www.americanmuscle.com/frpp-355-gears-2015.html Can I do this? Will this...

Looks like another company has joined the party on aftermarket shock mounts. J&M Adjustable Rear Upper Shock Mounts https://www.opmustang.com/store/p333/J%26M_Products_2015-2019_Mustang_Adjustable_Rear_Upper_Shock_Mount.html#/ Also, height adjustable for increased bump travel.

Has anyone with a JLT intake done mods to seal the airbox to the hood or done anything else to reduce IATs? It is an 85* degree day and idling for awhile and with the A/C on, my IAT hit 156*. Honest answers only please. I'm not going back to the stock airbox or switching to another CAI. I just...

I’ve waited awhile to post my car up here, but now I’ve got most of the mods done to the car how I like. So I wanted share with you all! My goal was to make it into a proper GT car and to be equal to the PP model (or preferably better) and I think I’ve done that and then some. I took a long...

I’m just curious for you experienced power guys - how much power my car might be making. I will dyno it eventually but just curious for a rough estimate. 2015 Mustang GT 3.15 A6 car JLT CAI Stock intake and exhaust manifolds Gibson catback exhaust Lund FF tune on E85 My goal is to...