Originally Posted by markesc

I have the 2-piece Z1's front and rear. Love 'em! They are not like some past slotted rotors I had on other cars that made a ton of noise and vibration. Had "power slots" on my SC300 sold by Les Shwab(never ever go there!), and some EBC slotted on my WRX. The wrx made a ton of noise if you enjoyed having the windows down, the Lex it was major pedal vibration.

I'm thinking either the sprinkle pattern or just smaller staggered slots = benefits without the noise? Whatever the case is, they do the job seamlessly.