Fits select 1988-1995 Chevrolet and GMC C1500, C2500, C3500, K1500, K2500, K3500, R/V series trucks and Sierra models. These Prothane polyurethane radiator isolators are designed to replace the soft, factory rubber mounts that frequently perish due to heat, oil, and coolant exposure.

Over time, worn-out OEM isolators allow excessive radiator movement, which can lead to stress cracks in the core or tank seams and premature wear on cooling hoses. These high-quality polyurethane mounts provide a firmer seat for the radiator, stabilizing it within the support frame while resisting chemical degradation and road grime. This kit is a direct-fit solution for Small Block (SBC) applications, ensuring your cooling system remains secure under heavy-duty driving conditions.

• Replaces soft or degraded factory rubber isolators
• Constructed from durable, oil-resistant polyurethane
• Specifically designed for Small Block radiator configurations
• Precision molded for a direct fit in the factory radiator support
• Manufacturer Part Number: 7-1713-BL
• Color: Black

Fits select 1988-1995 Chevrolet and GMC C/K 1500, 2500, 3500 and R/V series trucks with small block engines.

These Prothane polyurethane radiator isolators are engineered to replace soft, degraded factory rubber mounts that often perish over time due to heat and engine fluids. Unlike OEM rubber, Prothane’s high-performance polyurethane is resistant to oil, grease, and road contaminants, ensuring your radiator stays properly aligned and securely seated. Maintaining correct radiator positioning is critical for fan shroud clearance and preventing unnecessary stress on the radiator core and tanks during heavy vibration or off-road use.

• Manufacturer Part Number: 7-1713
• Material: High-durability red polyurethane
• Provides superior vibration dampening over worn rubber components
• Direct fit for small block radiator mounting points
• Resistant to engine chemicals and environmental rot

Fits select 1968-1987 Chevrolet, GMC, Oldsmobile, and Pontiac models equipped with Big Block engines. These Prothane radiator isolators provide a secure, stable mounting point for your radiator while absorbing the chassis vibrations that can lead to core fatigue and leaks.

Unlike factory rubber mounts that degrade, crack, and soften when exposed to engine heat and automotive fluids, these isolators are molded from Prothane’s high-performance polyurethane. This material maintains its structural integrity and tension, ensuring the radiator remains properly aligned within the core support during spirited driving or heavy-duty use. These are designed as a direct replacement for the original equipment bushings, offering a precision fit for Big Block applications.

• Fits 1968-1987 GM Big Block applications
• Molded from durable, heat-resistant black polyurethane
• Replaces worn or compressed OE rubber mounts
• Reduces radiator movement and vibration-related stress
• Includes four isolators for a complete installation
• Manufacturer Part Number: 7-1712-BL

Fits select 1968-1987 Chevrolet, GMC, Oldsmobile, and Pontiac vehicles with Big Block engines.

Prothane polyurethane radiator isolators are a critical upgrade for aging GM cooling systems. Over time, original rubber mounts soften, crack, and compress, allowing the radiator to vibrate and shift within the support. These precision-molded red polyurethane isolators (MPN 7-1712) provide a firmer, more stable seat for the radiator, protecting it from the damaging effects of excessive movement and ensuring proper alignment with the fan shroud.

• Designed specifically for Big Block radiator applications
• High-performance polyurethane construction outlasts factory rubber
• Resistant to automotive fluids, road grime, and extreme engine bay heat
• Direct replacement for worn OE isolators
• Vibrant red finish
• Manufacturer Part Number: 7-1712

Fits select 1968-1987 Chevrolet and GMC vehicles, including Camaro, Chevelle, Nova, and C/K Series Trucks equipped with small block engines.

Over time, original equipment rubber radiator isolators dry rot, crack, and compress, leading to excessive radiator movement and potential damage to cooling fins or hose connections. These Prothane isolators are engineered from premium polyurethane to provide a more durable and secure mounting solution than factory rubber. They are designed to withstand the high temperatures of the engine bay and remain resistant to oils, grease, and road grime that typically degrade standard mounts.

• Replaces worn or cracked factory rubber mounts to restore radiator stability
• Polyurethane construction provides superior longevity and heat resistance
• Maintains precise radiator alignment to prevent vibration-related fatigue
• Resistant to automotive fluids and environmental contaminants
• Color: Black
• Manufacturer Part Number: 7-1711-BL

Fits select 1968-1987 Chevrolet and GMC models, including Camaro, Chevelle, Nova, and C/K Series trucks equipped with Small Block engines.

Prothane radiator isolators are designed to replace soft, degraded factory rubber mounts that can perish over time due to heat and engine fluids. By upgrading to high-performance polyurethane, you ensure the radiator remains securely positioned within the core support, preventing unnecessary movement and potential damage to the cooling fins or hose connections. Unlike OE rubber, these isolators resist oil, grease, and environmental contaminants for significantly improved longevity.

• Part Number: 7-1711
• Material: High-Performance Polyurethane
• Color: Red
• Application: Small Block (SBC) Radiator Mounting
• Resists heat-cycling and chemical degradation better than factory rubber
• Restores proper radiator alignment and vibration damping

Fits select 1965-1990 Buick, Chevrolet, Oldsmobile, and Pontiac models including Caprice, Chevelle, El Camino, and Cutlass.

Standard rubber spring isolators are prone to dry-rotting, cracking, and compressing over time. When these factory components fail, the metal-on-metal contact between the spring and the chassis leads to increased road noise, vibration, and harshness (NVH). The Prothane rear upper coil spring isolator is engineered from high-density polyurethane to provide a durable, long-lasting cushion that maintains its shape and integrity far longer than original equipment (OE) rubber.

This isolator is designed to drop into the factory location, providing a precise fit for classic GM A-Body, B-Body, and G-Body platforms. It effectively decouples the coil spring from the frame, restoring a quiet ride and ensuring proper spring alignment. The black finish provides an understated look for restoration or performance projects.

• Replaces worn or perished factory rubber isolators
• Constructed from high-performance polyurethane
• Maintains structural integrity under heavy suspension loads
• Location: Rear Upper
• Color: Black
• Manufacturer Part Number: 7-1706-BL

Fits select 1965-1990 GM vehicles, including Buick LeSabre/Riviera, Chevrolet Caprice/Impala/El Camino, Oldsmobile Delta 88/Cutlass, and Pontiac Bonneville/Grand Prix.

Replace deteriorated factory rubber with the Prothane 7-1706 Rear Upper Coil Spring Isolator. Over time, original equipment (OE) rubber isolators rot and flatten, resulting in metal-on-metal contact, unwanted suspension noise, and a sagging rear ride height. These red polyurethane isolators are engineered to provide a firm, stable seat for your rear coil springs, offering significantly greater longevity and resistance to deformation than standard rubber.

• Enhanced Durability: High-performance polyurethane construction resists road salts, oils, and chemical contaminants that cause rubber to fail.
• Maintain Geometry: Helps preserve proper spring alignment and ride height by providing a consistent, non-compressible interface between the spring and the chassis.
• Noise Reduction: Effectively isolates the spring from the frame to reduce vibration and harshness while maintaining a precise fit.
• Manufacturer Part Number: 7-1706
• Position: Rear Upper
• Finish: Red Polyurethane

Eliminate rear axle deflection and improve power delivery in your 1984-2002 GM F-Body with these Prothane torque arm mount bushings. Designed as a high-performance replacement for soft factory rubber, these bushings stabilize the torque arm to maintain more consistent pinion angles under heavy acceleration and braking.

These red bushings are engineered to resist the degradation common with original equipment rubber mounts, standing up to heat, oil, and road grime. By reducing the movement of the torque arm, they help minimize wheel hop and ensure that more power reaches the pavement, making them an essential upgrade for both street and track-driven Camaros and Firebirds.

• Manufacturer Part Number: 7-1609
• Color: Red
• Application: Rear Torque Arm Mount
• Full Year Span: 1984-2002
• Material: High-performance polyurethane
• Replaces worn or soft OE rubber bushings

Fits select 1984-2002 Chevrolet Camaro and Pontiac Firebird models (Base, Z28, Formula, Iroc-Z, and SS).

Fits 1963-1982 Chevrolet Corvette Base, Stingray, Collector's Edition, and special editions.

Prothane polyurethane differential pinion mounts are engineered to replace the soft, factory-installed rubber bushings that are prone to cracking and excessive deflection. These high-durometer polyurethane mounts provide the necessary rigidity to stabilize the rear differential under high torque loads, ensuring proper pinion angles are maintained for efficient power delivery and reduced drivetrain vibration.

Designed for durability and precision, these components are impervious to automotive oils, road salt, and atmospheric conditions that typically cause OEM rubber to fail. This kit is a direct-fit replacement that improves the handling characteristics and reliability of the Corvette C2 and C3 rear suspension systems.

• Material: High-performance black polyurethane
• Restores drivetrain alignment and maintains pinion angle
• Resistance to oil, grease, and road contaminants
• Precision fit for factory mounting locations
• Manufacturer Part Number: 7-1606-BL

Fits select 1961-1975 Chevrolet and GMC K-Series 4WD trucks and SUVs, including K10, K20, K30, Blazer, and Jimmy.

Maintain proper drivetrain alignment and reduce excessive transfer case movement with this Prothane polyurethane torque mount. Factory rubber mounts are prone to softening and degradation from age and fluid exposure, which leads to driveline slop and shifting issues. This black polyurethane replacement is engineered to provide superior durability and firm support under high-torque conditions, ensuring your 4WD system stays properly positioned.

• Precision-molded from high-density black polyurethane
• Replaces worn or oil-soaked factory rubber mounts
• Resistant to automotive fluids, road grime, and ozone
• Improves drivetrain stability and power transfer
• Manufacturer Part Number: 7-1603-BL