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The plan was to do this exact thing at Mid-Ohio the weekend before last but there was more water than not and ended up being like 6 sessions in the rain so I didn't get much track time. I'll have 3 days at Gingerman in June to play with that I can report back on with back to back comparisons...

Most likely it is doing it based on fuel trims. So say the car wants X amount of fuel at a given RPM/load on 93 octane. If the car now is learning an extra 15% fuel addition in that area, you can roughly math out the ethanol content. The reason this has some variances versus real percentage...

If you haven't already found it or implemented another solution - you can use the Grimspeed resistor plug for the active exhaust one and save yourself some headache. Then you can change modes and make it easier to deal with. http://www.grimmspeed.com/exhaust-valve-defeat-module/

Void? No. Could you have a claim denied? Yes.

Thanks for the information. We definitely had the talk about the sound and he is mostly interested in the twin-dual tips look as well as the active exhaust since I was going to sell it to him really cheap. If it is that much of a pain it might not be worth it versus Don's option. Thanks!

How much effort other than changing the rear valence do you need to do to put a GT350 catback on a '15 GT? I have a friend whom is interested in my stock catback mostly because I'll sell it to him cheap and he is really interested in the active exhaust to make it louder or quieter as he would...

I'll get some up momentarily.

I run a 305/30F 325/30R setup on my 6GRs. The rear still looks slightly stretched as this size does not run particularly wide but isn't terrible either. It does pretty well in HPDE and is very good about wear. I was able to do 1.22G/1.20G in turns with that setup at a local road course so...

My $.02 is that it would be a pretty good idea to get the insurance. Due to the nature of this sort of event you are going to have a high variation in skill with the other drivers going out there with you. From my experience there are 3 ways you get into trouble: - You screw up and go off. If...

Well, I got the e-mail last night that the two 305/30/19s are cancelled and the reps I have talked to are all unwilling to do anything but tell me to place an order when they are back in stock. I did get the 2 315/30/19 Cup 2 rears. If anyone wants them, all I want out if it is the $720 I...

Wow I love that setup - please post pics, if you can get them, once those are on a car. I am really curious about how much they poke.

The two 315/30/19 Cup 2 rears are waiting for me at the store. I am told the 305s are supposed to ship tomorrow, but we will see what happens. As mentioned before I got PM'd on the fronts already (if they show up) but if someone wants to buy these rears that I'm not going to be able to use...

I did get PM'd from someone already on the fronts - if I get them and they fall through I will let you know. Did you need a set of rears too?

I got a PM from someone interested specifically in the fronts and order status just updated that the rears are on their way to the store in case you or anyone else wants them. Just let me know.

I got the cancellation e-mail but on the chance I do end up getting shipped a set of 305/315 Cup2s, anyone want to buy them? I am out of Chicago and I would rather not ship. I just got clarification on rules for the time attack class that I want to run next year and I'm going to have to go...

This is very interesting. I know I was one of the ones who was a bit of a naysayer on this test and while I definitely don't think we can take these numbers as gospel I would have expected the R (all things being equal) to post slightly higher numbers due to lower rotating mass from the lighter...

You can - it seems like some people choose to and some people don't - you will end up changing them more frequently either way though, obviously.

Haha, so the consensus is that these are well known but not much posted about for noobs to discover, haha.

Sorry if this is common knowledge - did a search for Caliperfexion and nothing came up. This car is both my first Mustang and my first Ford. Excuse my ignorance.

I just bought (and am gambling on as I have not yet found anyone else using them) a front brake bolt caliper kit from Caliperfexion that I will be putting on the car. I plan on trying to hit several track days a year with this car so this seems like it will save me some headache but I wanted to...