Brake Kit for Heavy-Duty GM Front Applications

The Dynamite Friction DFC GEOSPEC Coated Rotors with 5000 Advanced Brake Pads - Ceramic and Hardware kit is built for front brake service on select Chevrolet and GMC trucks, vans, and Suburban models from 1978-1993. Part number 4512-48078 combines coated rotors, ceramic pads, and matching brake hardware in one service kit for OE-style brake replacement.

Key Features

• Front disc brake kit with GEOSPEC coated rotors, 5000 Advanced ceramic pads, and brake hardware
• Dry-coated rotors arrive ready to install, with a silver-gray finish that resists rust better than conventional paint or zinc coatings
• Rotors are machined to OE specifications with a non-directional finish for smoother pad bed-in and quieter stops
• 5000 Advanced pads are post-cured and scorched to reduce break-in time and improve initial stopping response
• Premium rubber-steel-rubber shims help reduce noise, vibration, and harshness
• Hardware uses PTFE coating, vulcanized rubber, and stainless steel construction

Product Details

DFC’s GEOSPEC rotor line is engineered for durability and stable braking performance, using G3000/G11H18 cast iron and 100% inspection on critical dimensions. The coated surface is processed dry and shipped dry, so there is no oil film to clean before installation. The 5000 Advanced pad formulation is developed for a wide range of vehicle braking demands, including family-duty and light-truck use, with friction characteristics matched to axle-specific requirements. Part number 4512-48078 is a practical front brake service solution for Chevrolet C20, Chevrolet P30, GMC P3500, and related GM platforms listed below.

What This Kit Helps Address

• Front brake noise from worn pads or fatigued hardware
• Rust buildup on exposed rotor surfaces
• Uneven pad wear caused by aged caliper hardware
• Longer stopping distances from worn friction material
• Brake pulsation related to rotor wear or finish condition

Installation Notes

Before ordering, verify rotor size, brake package, axle type, and drum height notes against your vehicle’s existing setup. This kit is for front position applications only. For a proper brake job, inspect calipers, hoses, and mounting surfaces during service, and follow the vehicle manufacturer’s torque and bedding procedures after installation.

Fitment

• Fits 1990-1993 Chevrolet P30, front; SRW; JB7 & JD7 Brakes; 13 x 2-1/2 inch Rear Shoes.
• Fits 1993 GMC P3500, front; Single Rear Wheels; JB7 & JD7 Brakes; 13 x 2-1/2 inch Rear Shoes.
• Fits 1992 Chevrolet G30, front; Single Rear Wheels; 13 x 2-1/2 inch Rear Shoes; Floating Axle.
• Fits 1992 Chevrolet G30, front; Single Rear Wheels; 13 x 2-1/2 inch Rear Shoes; Semi-Floating Axle - Brake Drum fitment.
• Fits 1992 GMC G3500, front; Single Rear Wheels; 13 x 2-1/2 inch Rear Shoes; Floating Axle.
• Fits 1992 GMC G3500, front; Single Rear Wheels; 13 x 2-1/2 inch Rear Shoes; Semi-Floating Axle - Brake Drum fitment.
• Fits 1990-1992 GMC P3500, front; Single Rear Wheels; JB7 & JD7 Brakes; 13 x 2-1/2 inch Rear Shoes.
• Fits 1990-1991 Chevrolet G30, front; Single Rear Wheels; Semi-Floating Axle.
• Fits 1990-1991 Chevrolet G30, front; Single Rear Wheels; Floating Axle; 5-1/2 inch Tall Brakes.
• Fits 1990-1991 Chevrolet G30, front; Single Rear Wheels; Floating Axle; 5-1/4 inch Tall Brakes.
• Fits 1990-1991 Chevrolet R2500 Suburban, front; Semi-Floating Axle.
• Fits 1989-1991 Chevrolet R2500 Suburban, front; Floating Axle.
• Fits 1990-1991 GMC G3500, front; Single Rear Wheels; Floating Axle; 5-1/2 inch Tall Brakes.
• Fits 1990-1991 GMC G3500, front; Single Rear Wheels; Floating Axle; 5-1/4 inch Tall Brakes.
• Fits 1990-1991 GMC G3500, front; Single Rear Wheels; Semi-Floating Axle.
• Fits 1988-1991 GMC R2500 Suburban, front; Semi-Floating Axle.
• Fits 1988-1991 GMC R2500 Suburban, front; Full-Floating Axle.
• Fits 1985-1989 Chevrolet G30, front; Single Rear Wheels; 5-1/2 inch Tall Drums.
• Fits 1985-1989 Chevrolet G30, front; Single Rear Wheels; 6-1/2 inch Tall Drums.
• Fits 1981-1989 Chevrolet P20, front; 13 inch Rear Drums; JB7 Brakes; JD7 Brakes; 6-1/2 inch Tall Drums.
• Fits 1981-1989 Chevrolet P20, front; 13 inch Rear Drums; JB7 & JD7 Brakes; 5-1/4 inch Tall Drums.
• Fits 1985-1989 Chevrolet P30, front; SRW; 2-1/2 inch Rear Shoes; JB7 & JD7 Brakes.
• Fits 1989 Chevrolet R2500, front; 5-1/4 inch Tall Drums.
• Fits 1989 Chevrolet R2500, front; 6-1/2 inch Tall Drums.
• Fits 1989 Chevrolet R2500 Suburban, front; Non Floating Axle.
• Fits 1985-1989 GMC G3500, front; Single Rear Wheels; 5-1/4 inch Tall Drums.
• Fits 1985-1989 GMC G3500, front; Single Rear Wheels; 6-1/2 inch Tall Drums.
• Fits 1981-1989 GMC P2500, front; 13 inch Rear Drums; 6-1/2 inch Tall Drums.
• Fits 1981-1989 GMC P2500, front; 13 inch rear drums with 5-1/4 inch height.
• Fits 1980-1989 GMC P3500, front; Single Rear Wheels; 2-1/2 inch Rear Shoes; JB7 & JD7 Brakes.
• Fits 1988-1989 GMC R2500, front; 6-3/8 inch Tall Drums.
• Fits 1988-1989 GMC R2500, front; 5-1/4 inch Tall Drums.
• Fits 1988 Chevrolet R20, front; 6-3/8 inch Tall Drums.
• Fits 1988 Chevrolet R20, front; 5-1/4 inch Tall Drums.
• Fits 1988 Chevrolet R20 Suburban, front; Non Floating Axle.
• Fits 1988 Chevrolet R20 Suburban, front; Floating Axle.
• Fits 1987 Chevrolet R20, front; 13 inch Rear Drums; 6-1/2 inch Tall Drums.
• Fits 1987 Chevrolet R20, front; 13 inch rear drums with 5-1/4 inch height.
• Fits 1987 Chevrolet R20 Suburban, front; 13 inch Rear Drums (JB7 & JD7 Brakes); 5-1/4 inch Tall Drums.
• Fits 1987 Chevrolet R20 Suburban, front; 13 inch Rear Drums (JB7 & JD7 Brakes); 6-1/2 inch Tall Drums.
• Fits 1987 GMC R2500, front; 13 inch rear drums with 5-1/4 inch height.
• Fits 1987 GMC R2500, front; 13 inch Rear Drums; 6-1/2 inch Tall Drums.
• Fits 1987 GMC R2500 Suburban, front; 13 inch Rear Drums; JB7 & JD7 Brakes; 5-1/4 inch Tall Drums.
• Fits 1987 GMC R2500 Suburban, front; 13 inch Rear Drums; JB7 Brakes; JD7 Brakes; 6-1/2 inch Tall Drums.
• Fits 1981-1986 Chevrolet C20, front; 13" Rear Drums, JB7 & JD7 Brakes, and 5-1/4" Tall Drums.
• Fits 1985-1986 Chevrolet C20, front; 13 inch Rear Drums and JB7 & JD7 Brakes, as well as 6-1/2 inch Tall Drums.
• Fits 1985-1986 Chevrolet C20 Suburban, front; 13" Rear Drums, JB7 & JD7 Brakes, and 5-1/4" Tall Drums.
• Fits 1985-1986 Chevrolet C20 Suburban, front; 13 inch rear drums and JB7 & JD7 brakes, with 6-1/2 inch tall drums.
• Fits 1981-1986 GMC C2500, front; 13 inch Rear Drums; 6-1/2 inch Tall Drums.
• Fits 1981-1986 GMC C2500, front; 13 inch rear drums with 5-1/4 inch height.
• Fits 1985-1986 GMC C2500 Suburban, front; 13 inch Rear Drums; JB7 Brakes; JD7 Brakes; 6-1/2 inch Tall Drums.
• Fits 1985-1986 GMC C2500 Suburban, front; 13 inch Rear Drums; JB7 & JD7 Brakes; 5-1/4 inch Tall Drums.
• Fits 1981-1984 Chevrolet C20, front; 13 inch Rear Drums, JB7 & JD7 Brakes, and 4-5/8 inch Tall Drums.
• Fits 1981-1984 Chevrolet C20, front; 13 inch rear drums and JB7 & JD7 brakes, with 6-1/2 inch tall drums.
• Fits 1981-1984 Chevrolet C20 Suburban, front; 13 inch Rear Drums, 4-5/8 inch Tall Drums, Over 7100 Gross Vehicle Weight (GVW).
• Fits 1981-1984 Chevrolet C20 Suburban, front; 13 inch Rear Drums, 6-1/2 inch Tall Drums, Over 7100 Gross Vehicle Weight (GVW).
• Fits 1981-1984 Chevrolet C20 Suburban, front; 13 inch Rear Drums, 5-1/4 inch Tall Drums, Over 7100 Gross Vehicle Weight (GVW).
• Fits 1981-1984 Chevrolet G30, front; Single Rear Wheels.
• Fits 1980-1984 Chevrolet P30, front; SRW; 2-1/2 inch Rear Shoes; JB7 & JD7.
• Fits 1981-1984 GMC C2500, front; 13 inch Rear Drums; 4-5/8 inch Tall Drums.
• Fits 1981-1984 GMC C2500 Suburban, front; 13 inch Rear Drums; Over 7'100 lb Gross Vehicle Weight (GVW); 6-1/2 inch Tall Drums.
• Fits 1981-1984 GMC C2500 Suburban, front; 13 inch Rear Drums; Over 7'100 lb Gross Vehicle Weight (GVW); 5-1/4 inch Tall Drums.
• Fits 1981-1984 GMC C2500 Suburban, front; 13 inch Rear Drums; Over 7'100 lb Gross Vehicle Weight (GVW); 4-5/8 inch Tall Drums.
• Fits 1981-1984 GMC G3500, front; Single Rear Wheels.
• Fits 1981-1983 Chevrolet P20, front; 13 inch Rear Drums; JB7 & JD7 Brakes; 5 inch Tall Drums.
• Fits 1981-1983 GMC P2500, front; 13 inch Rear Drums; 5 inch Tall Drums.
• Fits 1978-1980 Chevrolet C20, front; 13 inch Rear Drums and JB7 Brakes.
• Fits 1979-1980 Chevrolet C20 Suburban, front; 13 inch Rear Drums, JB7 Brakes, Over 7100 Gross Vehicle Weight (GVW).
• Fits 1979-1980 Chevrolet C30, front; 2-1/2 inch Rear Shoes, JB7 Brakes.
• Fits 1979-1980 Chevrolet G30, front; Single Rear Wheels; 13 inch Rear Drums; JB7 Brakes.
• Fits 1978-1980 Chevrolet P20, front; 13 inch Rear Drums; JB7 Brakes.
• Fits 1979-1980 GMC C2500, front; 13-inch rear disc brake pads.
• Fits 1979-1980 GMC C2500 Suburban, front; 13 inch Rear Drums; Over 7'100 lb Gross Vehicle Weight (GVW); JB7 Brakes.
• Fits 1979-1980 GMC C3500, front; 2-1/2 inch Rear Shoes - Disc Brake Rotor.
• Fits 1979-1980 GMC G3500, front; Single Rear Wheels; 13 inch Rear Drums.
• Fits 1979-1980 GMC P2500, front; 13-inch rear disc brake pads.
• Fits 1979 Chevrolet P30, front; SRW; 13 x 2-1/2 inch Rear Shoes; JB7.
• Fits 1979 GMC P3500, front; 2-1/2 inch Rear Shoes - Disc Brake Rotor.

Quality Assurance

DFC states that the rotors are 100% inspected for critical dimensions and balance where applicable, and the kit uses post-cured pads with premium shims for stable friction and improved NVH control. The rotors include a 12-month warranty against defects in material and workmanship.