i have a 09 cobalt ss. does anyone know a company that makes cross drilled or slotted rotors for these cars cause i cant seem to find any

 

R1 concepts dot com

 

They are prone to cracking.

 

the last time youve heard someone on CSS have that happen? ..... ive never seen it or heard about it. only a few horror stories on the internet.

youll be fine.

 

for your rotors to crack im sure you gotta put them through hell and back .... never have i actually seen that.

 

you can crack them sure. But you have to abuse the **** out of your brakes and daily autocross and road race the car with very aggressive pads.

 

This. I had mine that were drilled and slotted from here for a few years with no problems.

Everyone is gonna tell you they are prone to cracking. Have never seen anyone post on here about it.

 

R1

Had mine for over a year and a half, no problems
I haz autobahn, no problems

 

Not my video
but this is what happens, all of the time
Cut off by a porsche on autobahn - YouTube

 

r1's are good i have a set of the slotted ones. so far i can say no warpage with hawk hps pads for about 8000 miles i've had them and they brake really good. i don't autox or anything, its just an aggressive daily driver with the occasional ^^^(see vid above)^^^

 

drt-sport dot com

I purchased a set of 4 for under $300.00 including shipping.

 

They crack. One really hot run is all it takes. Are you gonna do it in 1 stop? Probably not, but unless you are paying attention to the state of the rotors, it is not worth getting them. Why would you even want them in the first place? So you can look like some idiot Porsche?

 

Porsche's look nice lol. I agree though, don't waste money and BS aftermarket parts. As Wangspeed told me earlier the best is stock brakes. I had to go to the track a few times to figure it out for myself. I have stock rotors with HPS pads. I'm changing my whole set up back to stock, all brand new. These hps pad can not handle my track days braking from 130-80 mph in 1 second lol

 

If legit OEM drilled/slotted rotors existed for our cars (like the ones that come on Porsches and Ferraris) then I would get them but these aftermarket ones are just no good if you plan to track race or do any semi regular competitive racing. I would bet they would be okay for normal driving but I wouldn't take the risk.

 

Porsche and Ferrari rotors (carbon ceramic aside) crack just as often under hard use.

 

i've had them on my car since i bought it which was 2 years ago, idk how long the previous owner had them on and i haven't had any issues with them.

 

only a handful of the people on this site will ever put these brakes through stress. i can probably count them off on one hand. if not one then less than half of another

 

I have personally cracked multiple sets of rotors. Drilled rotors are garbage. That being said, if you only drive on the street and enjoy reduced pad life so you can look cool, buy them. On the street you will be perfectly fine. Porsche and countless other OEs feel necessary to put the junk on cars right from the factory, don't see an issue with only driving them on the street.


The ones that come on those cars from the factory are just drilled blanks, they crack just as easy.

Edit: Wangspeed already said all of this, I should've read the entire thread before posting

 

for a ss/tc stock rotors/pads are the best unless you want $1000 two piece rotors from john so save your money and use it on something else

 

I guess what I was thinking in my head was rotors like these....

 

haha those are two piece probably carbon ceramic rotors that come on the zr1 lol those are like $10k for a set of rotors/pads/calipers

 

we were just talking about this at the meet last weekend. lol

 

Buddy of mine just bought a GT3, was talking to him at an autocross over the weekend, and the rotors are supposedly 26,000 dollars. And as an added bonus, the brakes don't work until they get some heat in them, haven't driven it yet, but just going by what he and his co-drivers have told me.

 

Yeah, carbon ceramic don't work for **** until you're blazin' around a race track. He aint lying about that, thats for sure. The $26k price tag.... That seems a bit high. I could believe $10k. But hey, that sucks either way.

 

Supposedly the fronts are 8k each, rears 5k. Sounded high to me too.