Anyone running 315's out the back? What do u run on the front? Tailpipes?

I haven't noticed any issues with handling. I run a magnaflow catback and my 315's dont rub at all, I did remove my quad shocks and had to massage the inner fender. I don't really have any serious mods so traction is never really any issue lol. I also run the sumitomo tires, you really cant beat them for the price. I don't know how well they would do with the kind of power your making though.

You can definitely keep your 255's. I run a 275 in the front with no problems.

i run 275s up front and 315s out back.. BFG drs out back. i currently am running dumps but desperately want to go back to tail pipes so i will definitely be subscribing to this thread!!

i run 275s up front and 315s out back and the bitch feels like its on rails, i didnt have to remove any quad shocks or massage any fenders, of course my car isnt lowered that much, only about 1.5 inches with the eibach pro-kit. and i have a flowmaster catback and i have plenty of room between the pipes and tires. of course the tail pipes are only 2 1/4 inch IIRC

well i was reading around on here before i purchased my wheels and tires and some complaints people had with the 275s up front is that you feel every little dip or curve in the road. like the car will follow every dip. and also if you drive your car in the rain at all, there were issues of hydroplaning. these people with these issues said they wished they went with 255s up front instead.

but if you dont drive your car in the rain, i agree with you that the 275s are a better match. but just run your 255s til you need new ones and then get the 275s,

i got my rims from latermodelrestoration.com and they have the correct offset for the mustangs. my wheels/tires match the lip of the front and rear fenders perfectly. i dont think they stick out at all IIRC

I had 275's in front with 315's in rear. The rear I have no quads, UPR upper and lower control arms, bullitt springs and shocks, flowmaster american thunder 2.5 tailpipes. I had to roll the back edge of the inner wheelwell. I also have 17x11 rear rims not the 10.5 ones you see most of the time.

I had some 265 mich pilots put on the front to see about bringing the tires in a tad as I have a 9.5 wide front rim no the 9in wide rims. With the 275's I did feel every crown in the road (horrible roads in the St. Louis area btw...IIRC ranked in the bottom 10 of the nation) but the front sysp was stock/factory/original...I just put on 03 arms, new bullitt struts and bushings and an align before putting it up for the winter. I hope it has helped but will find out in the spring.

I was running yokohama AVIS sport tires in the rear but picked up some BFG DR...one thing from the yokohama tires the stiff sidewall was not the best for launching. I could run the tires down to 8psi and the tire looked like it was fine no sag/droop that same tire is now a run flat not sure if mine was prior to being rated as such or what but one spring there was 5psi and I would not have known if I did not check. The yokohama had good wet traction.

I run 315 BFG Drag Radial's out back. Probably the widest 315 I've ever seen except maybe the M/T's. I used to run tailpipes from my Flowmaster catback, but I went to a panhard bar so I have to run dumps (I might get pipes in there, but it will be tight and they'll have to be custom built.).

I run 275's up front now, I used to run 255's until I wore them out. I autocross the car and have no handling "quirks" that are unexpected. The only thing you could call a quirk is the fact that the DR's are a bit unforgiving, they hold hard in corners but give little warning before a slide as any other soft compound tire would, and they tend to create a bit of "push" under power as long as they hook.. the tires alone aren't to blame, as it tends to lift the front a bit under the torque of the 347 and unload the suspension, and at the same time the tires simply push the car whatever direction it's facing. Simple hrottle modulation and/or occasionally a bit of throttle induced oversteer helps depending on the situation