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What are your current wheel and tire specs? The RE71R is a great tire for autocross regardless of size (Tire is arguably in the top two available right now, with the BFG Rival being the other), and I figured I'd cram as much as I could under the car. This line of thought works as long as you can...

The cases are iron for all manual cars from 2015-17. Automatic cars came with aluminum housings. So you should have no problem finding the manual flange and iron housing as they are mutually inclusive. I assume you don’t care what’s inside? Meaning you’re not looking for a Torsen or specific...

I have been in CAMC all season in 2018, albeit pretty seriously under-prepped based on what a CAM car could be. Steeda adjustable shocks/struts Steeda dual-rate springs Roll-center corrected front arms Full bearings everywhere front & rear Stock swaybars front and rear 19x11 305 squared RE71R...

What will be the offset of the wheels after widening to 12”?

@TigerFire13 just ordered a set of 12’s.......SQUARED. Rear offset is +47 and there’s a reason for that. They will still fit fine with a 305/315/325 but will allow enough room inboard to go up to a 345 or even a 355 without touching the shock or mount (including OEM setup, even though car has...

VikingJoe - did you use a JLT intake for a 15-17 application or for a 2018? I put a 15-17 JLT on my 2018 manifold-equipped 2017 GT, and it hits the hood enough that I don’t want to just slam it shut and hope for the best. Maybe an angled silicone coupler?

Swapped a 2018 Intake Manifold onto my 2017 GTPP last weekend. Stock throttle body. I also installed a 2015-17 JLT 110mm intake setup (filter/airbox/tube/silicone coupler), but the new manifold changes the angle of the throttle body, and thus the intake tube and silicone coupler. I have heard...

I’d love to turn wheels at Barber sometime in 2019. I’ve heard of Rezoom, I’ll keep an eye on their schedule. Good looking car! I may be a little biased ;)

Update: I performed the tire size update that @Glas86 suggested in the past few posts. Leave the gear ratio value alone, and change the tire size value from 0858 to 07F0. The checksum automatically recalculates itself. This will throw a P160A DTC code. Do NOT relearn the PCM. The DTC will remain...

Excellent feedback. Which organization did you go with? Any feedback on how it was run? Entry costs?

@EastTNMustang I have a few questions for you 1. What was your stock gear ratio and tire size? (Basically what did line 726-12-01 in Forscan look like?) 2. What tire size did you put in when you updated it? 3. What tires are you running, are they actually shorter or did you only change that...

Felix, reading your last two posts made me sit back and think about this for a while. Then I went back through this entire thread, post by post. Re-reading the snippet that I quoted above from EastTNMustang, it clicked that you two fixed your limp-mode issues the exact same way. Leave the OEM...

If you’re using aftermarket rotors, skip the drilled types. Actually smooth faced plain rotors do best, or if you must have a design in them go for slotted only. To echo many others here, the OEM rotors are cheap, durable, and work great. Why mess with what works? As for the pads, I use Z26 in...

Powerstop makes decent pads, good quality for the money. Z23 and Z26 are the EXACT SAME COMPOUND. The Z23 uses a rubberized backing plate for comfortable and quiet use, and the Z26 uses a stainless steel backing plate for extra strength and heat tolerance. I have the Z26 pads in my GTPP...

I hope they are producing wider sizes in 19” as well. Do you happen to have a list of sizes they’re making and a date when they’ll be available?

EastTNMustang - Technically speaking, I have done this already...by setting EVERYTHING in FORscan back to factory settings, and relearning the PCM. The DTC (U0422) goes away, but the driving issue remains. Limp-mode in 4th & 5th gears (obvious in those gears anyway, who's to say it isn't...

The hitch blends in to the bottom of the car well. All the support work is completely hidden, the only thing exposed is the square tube receiver portion. It's small and powdercoated black, so it doesn't really draw any attention. I have a CJPP/SuForce diffuser and it helps break up that area...

Did you make a change to gear ratio, or just tire size?

The tire Boardkat is using is the BF Goodrich Rival S in size 335/30R18. Tire rack lists the diameter at 25.9". Mounted on a 13" wheel (slightly wider than recommended rim width range), it may reduce the height ever so slightly. Remember that no vendor, Tire Rack included, has dimensions which...

Where does the lip of the wheel sit in relation to the shock mount on a 20”? I know the diameters are different, and that can really affect fitment based on hard-parts interference. For example, a friend of mine runs the AirLift 3P system and the front strut has a collar that is at the exact...