1999FirehawkLS1

iTrader: (21)

Looking for some Cross Drill Rotors or slotted or both, for my 03 SS Silverado AWD w Abs

Summit n Jegs all say 120 per rotor..... I know for my 99 Trans Am I got All 4 under 200.....

TX Tahoe Z71

iTrader: (28)

Go to your local auto yard and pull the brakes off an 05+ NBS or 07+ NNBS for cheap. 13" rotors up from your stock 12" ones for cheap. Got mine for $80 IIRC. Calipers and rotors are a direct swap. Need 17"+ wheels to clear them, which I assume you have.

I have Powerslot rotors and can't say I noticed a difference from stock rotors.

brent1976

iTrader: (1)

R1concepts, they have slotted, drilled, and both slotted and drilled. I had a set of what you are looking on my truck for 4-5 years until a pad went bad on the front and rear on the same day while I was an hour away. I never had a problem until then.

1999FirehawkLS1

iTrader: (21)

Im new to this forum and still learning the language lol whats NBS and NNBS stand for?

TX Tahoe Z71

iTrader: (28)

No worries. NBS is "new body style" 99-2007 classic, OBS is "old body style" pre 99 to I don't know, 91 maybe. And NNBS is "new, new body style" so 2007+.

But you will see a much better braking improvement from bigger stock rotors and better calipers from a NNBS than buying slotted stock-size rotors. Hydroboost swap also makes a huge difference; I got the parts at the local auto yard for $80.

Gordy M

iTrader: (2)

If you are towing a heavy load, you might find some advantage of going to slotted rotors, but like they said above a better move would be to the 13" rotors/clipers. Drilled rotors are for bling, and requires more brake effort to stop and can crack easier when used in high heat conditions--driving in mountains and towing. If you are intent on slotted/drilled there was a manufacturer in Canada making them and selling direct. I think he sometimes sells on fleebay. Personally I would be worried about using slotted/drilled on a heavy truck that were made in China.

1999FirehawkLS1

iTrader: (21)

Right so say I got get the Front Calipers New at a Auto parts store for a 07 Avy and slotted rotors for a 07 Avy itll bolt right on and have a 1in bigger rotors?

TX Tahoe Z71

iTrader: (28)

Yeah, they will bolt right up. Don't forget the brake fluid.

TX Tahoe Z71

iTrader: (28)

Link to swap info: GMT800 to GMT900 Brake Upgrade w/pictures

1999FirehawkLS1

iTrader: (21)

Nice so Im porb goin to need the Caliper mounting brakets also correct?