Machining grooves in new Brembo rotors?

[BillyCobin]

I just received my Brembo OEM replacement rotors from tirerack, and they have machining grooves.

All rotors I have bought from parts stores, or after I have had used ones turned, they had a smooth, mirror like finish. These grooves you can actually feel with your finger, and see.

Here are two pictures.

Pic 1

Pic 2

So, is this OK to put on the car? Or should I have them lightly machined to make them smooth?

[Dominic]

Thats normal, especially on high performance rotors, as it helps bed in the pads when you first use them. Its just like how in a new engines, the cyls are cross-hatched to allow the piston to "wear it in" and match it perfectly.

Those rotors are nice!! [img]graemlins/thumbsup.gif[/img]

[BillyCobin]

Yeah, they look, and feel, heavier than stock, if my memory is correct. I will take some comparison weights and pictures when I put them on.

Heck of a deal, 2 brembo front rotors shipped for 121 from tirerack.

[SilverTAWS6]

Yup, those are normal.
My autozone front rotors had that when I got them and my friend's front replacements had them too.

Chris