Accessories:Stainless Steel Flat Head Screws 3x10-2PCSManual number:8390Product major function & usage:Stabilize the motor, fast cooling with fins.Major advantages of upgrading to this product:Made with a quality light weight high tensile strength aluminum 6061 T6 for great durability and better stability of the motor. Better heat displacement for the motor to cool down during an intense drive.The features of general appearance of this product:On top of the original design, this part has added some fins on the design for better heat displacement.Other special notes and commentsIntallation:According to original spur gear 70T, 4 holes from A to D are confirmedFrom A to A, please use 20T pinionFrom B to B, please use 21T pinionFrom C to C, please use 22T pinionFrom D to D, please use 23T pinionSuitable Model:1/10 4WD FORD GT4-TEC 2.01/10 4WD 4-TEC 3.0 CORVETTE STINGARY-93054-4