I'm working on the C4 HD brake upgrade. I have 4th gen 50mm offset wheels 9" with 274/40/17 tires. I'm using 1LE hubs with the brakes. The hubs move the wheel out about .330". The C4 HD rotors move it out about .300" thats 16mm. If i were to go by the standard 2" spacers (51mm) i would get a 35mm spacer for the front and all should be well.

the question is:

If i were using stock brakes with a 2" spacer, and i lowered the car, would i have any issues with fender clearance? How much thinner could i go with the spacers (assuming stock brakes)??? I swear the 2" spacers normally make the wheels stick out a bit too far.

Lastly:

Will 1 3/4" spacers work in the back? with the wheels mentioned above? or will that cause issues too?