Ok so the GXP rotors are 12.72" correct? then why is it that every website I go to has several different choices but only one is the correct size? for instance http://www.partsamerica.com/ProductD...pe=221&PTSet=A
says its for the gxp but when you check the size it isnt correct!

Take a look at this
http://www.rockauto.com/catalog/x,ca...,parttype,1896

It looks like the rear rotor is(11.72" / 5 Bolt Holes / Vented}
Rear; GXP)
and the fronts are
(RAYBESTOS Part # 580264 {PG Plus Outside Diameter 12.715" / 5 Bolt Holes / Solid} Front; GXP)
I think the front rotor is also vented, that should be a typo on RockAuto'* part. Take a look at the pic.

ROD

Thanx rrounds I never did stop to look at the fact that they were for the rear.

Quick question. Do they make drilled or slotted rotors for this car?

I had 11.25" front rotors on my regal and got PowerStop drilled rotors for it, and the braking improvement was pretty big.

I've not seen any personally so I cant say for either one, but I will say that no matter what type of rotor you get its gonna be expensive!

So I read that the grand prix gxprotors are the same size in the front as the bonnie gxp (as far as diameter is concerned). So will the factory grand prix cross drilled rotors fit the bonneville?