Packaging Includes: Motor Mount-1pcs Grade 12.9 black Cap Head Screws 3x10-2pcs Original Name / Part No: 8390 Part location: Motor area Does this product replace a specific part or function: Yes Product major functions & usage : Stabilize the motor, fast cooling with fins. Is this part adjustable? If yes … how and why/purpose? How and why --- There are 11 positioning holes (A, B, C, D, E, F, G, H, I, J, K) for different mounting position. Purpose --- Adjust the motor gear and spur gear distance (PITCH) to keep the car's stability. Major advantages of upgrading to this part/product: Made with a quality light weight high tensile strength aluminum 7075 for great durability and better stability of the motor. Better heat displacement for the motor to cool down during an intense drive,On top of the original design, this part has added some fins on the design for better heat displacement. Intallation: According to original spur gear 70T, 4 holes from A to D are confirmed From A to A, please use 20T pinion From B to B, please use 21T pinion From C to C, please use 22T pinion From D to D, please use 23T pinion Suitable Model: TRAXXAS 1/10 4WD FORD GT 4-TEC 2.0 83056-4 TRAXXAS 1/10 4-TEC 3.0 CORVETTE STINGARY-93054-4 TRAXXAS 1/10 4-Tec 2.0 AWD Chassis with brushed power system-83024-4 TRAXXAS 1/10 4-Tec 2.0 Brushless AWD Chassis with BL-2S power system-83124-4 TRAXXAS 1/10 4-Tec 2.0 VXL AWD Chassis with velineon brushless system-83076-4 TRAXXAS 1/10 Factory Five 1933 Hot Rod Coupe-93044-4 TRAXXAS 1/10 Factory Five 1935 Hot Rod Truck-93034-4 TRAXXAS 1/10 Ford Mustang GT-83044-4 TRAXXAS 1/10 Toyota GR Supra GT4-93064-4