Rotor Thickness: 0.81"
Rotor Shape: Round
Rotor Construction: Vented
Drilled: No
Slotted: No
Bolt Pattern: 5 on 5"
Stud Length: 1.65"
Stud Diameter: 0.63"
Material Type: Cast Iron
Finish: Natural
Weight: 14.80 lbs.
MFG. Part #: 9850-6505
Sold in Quantity: Each
Position: Front
 
Info
This brake rotor combines the strength of a 75-81 Ford-style hub (Granada) with the lighter design of the metric brake rotor for an unbeatable lightweight and durable package.  AFCO engineers designed this rotor with the latest CAD software and testing methods.  Manufactured to withstand rigorous racing environments, the AFCO Hybrid Rotor uses totally new castings designed and built specifically for racing.  It will remove up to 12 lbs. of sprung weight on the front of your car to improve front to rear weight bias and wheel control.
Uses GM metric caliper
Ford 74-80 Pinto Spindle
Strong and Lightweight
Safely remove up to 13 lbs from the front of your car vs stock rotor
14.8# total rotor weight with 5/8" studs
10.13" diameter
.813" thickness (pad spacer recommended)
Instructions (PDF) 
Item Details
5/8" Coarse Studs on 5" x 5" Pattern
Notes
Proper Break-In Procedure for Steel or Cast Iron Rotors
New steel/iron rotors should be bedded in before being used in racing conditions. Proper bedding will prepare the rotor surface, prolong the rotor's life, and make it more resistant to thermal checking or cracking under severe braking conditions. The following procedures should be performed when bedding in both steel and cast iron rotors. It is best to bed in a new rotor using a used set of pads, preferably ones which will not create heat rapidly. Generating heat too rapidly will thermal shock the rotors. Likewise, when bedding in a new set of brake pads it is best to perform the process on a used rotor. This new/used bedding process permits controlled bedding of each individual component.
Make sure rotor surfaces are free from oils, grease, and brake fluid. Run vehicle up to a moderate speed and make several medium deceleration stops to heat up the rotor slowly. This will help reduce the chance of thermal shock caused by uneven heating of the rotor. Pull into the pits and allow the rotor to cool to ambient air temperature. Care should be taken not to ride the brakes into the pits as this may hot spot the rotor causing premature wear to the surface or structural damage.