guess each car is different (although the offset on the rim makes a big difference)
I have 335's 18's on SSRS, only had to shave a dime size slice off of each irs bolt (both sides) and that was it, fits fine both on and off the lift.
I have 335's 18's on SSRS, only had to shave a dime size slice off of each irs bolt (both sides) and that was it, fits fine both on and off the lift.