Go to RockAuto Home Page
More Information for ACDELCO 18A1227
Add to Cart
Continue Shopping
ACDELCO 18A1227close
Part image
Sold individually
ACDelco Professional Disc Brake Rotors provide reliable vehicle braking power and are an ideal premium aftermarket replacement for your GM or non-GM vehicle. They feature a thickness variation that is less than 0.0004 to minimize pedal pulsation, noise, and help increase brake pad life. These rotors meet the SAE standard for structural integrity with OE matched G3000 qualified material delivering guaranteed performance.

Features & Benefits:
  • Inspected for balance; helping with smooth brake operation and noise levels
  • Independently tested for Noise/Vibration/Harshness (NVH) and durability/wear testing; resulting in high quality, reliable rotors
  • Follows original manufacturers' designs for dispersing heat, helping to prolong pad and rotor life
  • Ready to be installed right out of the box no machining required
Discard Thickness (IN)0.63
Nominal Thickness (in)0.71
Pad Contact Surface Width (IN)1.6
Center Bore Diameter (MM)106.1
Outside Diameter (in)12.3
Bolt Circle Diameter (MM)139.7
Discard Thickness (MM)16.002
Nominal Thickness (mm)18.034
Height (in)2.7
Outside Diameter (mm)312
Pad Contact Surface Width (MM)39.65
Center Bore Diameter (IN)4.2
Bolt Circle Diameter (IN)5.5
Bolt Hole Quantity6
Height (mm)68.1
MaterialCast Iron
ConstructionFull Cast
Disc FinishGround
ABS Sensor Ring IncludedNo
Surface TypeSmooth
Hat FinishTurned
Solid Or Vented Type RotorVented
Rust Resistant CoatingYes
Alternate/OEM Part Number(s): 19175186, 89017029

Warranty Information:
24 Month / Unlimited Mile Warranty on parts sold on or after 04/01/18; 12 Months on parts sold before 04/01/18.
Warranty Details