I've got 18 inch rims with 235x40 kumho z rated sneakers. I've also got progressive springs, tokikos on all four corners, stillen bars front and rear. I'm still disappointed in the handling on high speed corners. The *** end still wants to slide out.

I'm curious as to what setups other folks are running, especially the tires. I believe the kumhos are the issue now. They just aren't sticky enough. I'm considering swapping out the tires with some other brand and possibly going with a 245 or 255 providing there is clearance.

I'm trying to dial all this in, in preparation for a SC. The SC will definately requite bigger meats with the additional HP.

Thats strange, my car is stock besides the wheels and tires, but my *** dont step out like urs during crazy fast driving. But the front does plow like sh!t in tight corners going in too fast. I heard good things about ur tires, u should just wear them out and get 245s later.

No problem here...
 

I have all of the stuff below and I don't have any problems. I took a 110 degree uphill turn at about 115 mph and that was the only time I felt uncomfortable but nothing went wrong thank goodness.

Khumo tires suck when pussed real hard. 245 would help but not gonna fix it all. The max sits high even with the 1" drops that are available. MIght try sway bar on the rear and a strut bar upfront. And get some pirrelli's or yoks. and if you want get a smaller side wall. ie 35 seairs.

Nitto's
 

I have Nitto's and have no complaints. They are still quite reasonable in price and handle extremely well. Maybe you should look into the FSTB and RSB to reduce some wheel hop.

try some toyo proxes t1-s or some falkans...you should lower theidewall height to 35 (up the rims to 19" if you have the funds)

I had Pirelli Pzero's and i feel that these have been the best tires yet. They grip really well expecially taking turns. But i am now going to switch to 19's, so i will see how those go.