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Part number: GD131
Product Details
EBC GD131 GD series Sport Rotor Kit (two pieces)
Products specifications
For Use with Stock Calipers No
Intended for Street Use No
Position Rear
Quantity Sold as a pair.
Rotor Construction Vented
Rotor Diameter 10.7in
Rotor Finish Gold zinc plated
Rotor Material Iron
Rotor Outside Diameter (in) 10.709 in.
Rotor Style Slotted and dimpled surface
Rotor Thickness (in) 0.748 in.

(633CSi, 3.3L (E24)) Built for the (78-82) BMW 633... ADVANTAGES:The wider slots on these rear rotors actually draw cool air across the pad surface keeping pads and rotors cooler. EBC believes these rotors also expel dust, dirt and hot gases better than fine slots which eventually fill with rust and scale. The blind drilled holes break down surface gases when braking from speed but do not weaken the rotor cross section as can happen with through drilling, thereby lessening the chance of rotors cracking over time and heavy use.Extra benefits of sport rotors are not often spoken about but are very worthwhile. This is the effect the slots have on maintaining a flat smooth pad surface during the pads wear life. The slots encourage the pads to wear with a more flat pattern and the "Ribbing" common with non slotted rotors does not appear. This removes the "Record groove" effect of pads on plain rotors, particularly around the outer edge and helps pads maintain better contact area with the rotor through their life. As far as EBC is concerned this is the MAJOR benefit of sport rotors over all others as honestly speaking EBC pads have such a high temperature rating they don't NEED degassing. EBC tests all pads to temps over 1000 degrees. WIDER APERTURE GROOVESSPECIAL DISC ALLOYS UNIQUE to EBCDIMPLE HOLE CONSTRUCTIONBALANCED GEOMETRY

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Fitment
BMW 630CSi
1978 BMW 630CSi ALL / Base
1977 BMW 630CSi ALL / Base
BMW 633CSi
1982 BMW 633CSi ALL / Base
1981 BMW 633CSi ALL / Base
1980 BMW 633CSi ALL / Base
1979 BMW 633CSi ALL / Base
1978 BMW 633CSi ALL / Base
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