Engine Mount Set

What Is an Engine Mount Set?

Engine mounts — sometimes called motor mounts — are the critical components that secure your engine to the vehicle's frame or subframe. Far from passive brackets, they perform a dual role: keeping the engine mechanically anchored in place while simultaneously absorbing and dampening the noise, vibration, and harshness (NVH) generated by the powertrain. A worn or failed engine mount can allow the engine to shift under load, causing everything from rough idle and drivetrain misalignment to damaged belts, hoses, and exhaust connections.

An engine mount set typically includes all the mounts needed for a complete replacement job — front, rear, and side mounts depending on the application. Replacing them as a set rather than one at a time ensures consistent performance and avoids the ripple effect of a single weak mount overloading the others.

Rubber vs. Polyurethane: Choosing the Right Material

The biggest decision when shopping engine mount sets is material. Rubber mounts are the OEM standard: they excel at isolating NVH and providing a smooth, quiet ride. Over time, heat, engine fluids, and cyclical stress cause the rubber to crack and soften, leading to excessive engine movement. Polyurethane mounts offer a performance-oriented alternative — they're more resistant to oil, coolant, and road chemicals, and they maintain their shape far better under the torque loads produced during hard acceleration. The tradeoff is that polyurethane transmits more vibration to the cabin, making it a popular choice for performance builds, track cars, or high-mileage daily drivers seeking longevity over plush refinement.

Signs You Need to Replace Your Engine Mounts

• Clunking or thudding noise when accelerating or shifting
• Excessive engine movement visible under the hood
• Rough idle or vibration felt through the floor or steering wheel
• Drivetrain misalignment or increased stress on CV axles and driveshafts
• Visible cracking, sagging, or separation in the mount's rubber section

Top Engine Mount Set Brands

Westar is one of the most comprehensive mount specialists in the industry, carrying an extensive catalog that spans rubber, hydraulic, vacuum-assisted, and electronic engine mounts. Their mounts are designed to meet or exceed OEM specifications and are tested on dynamic endurance machines that simulate real-world load conditions, making them a go-to choice for direct OEM-style replacement.

For drivers looking to step up to polyurethane, Energy Suspension is a performance suspension staple renowned for their Hyper-Flex® polyurethane formulation. Their motor mount sets deliver a firmer engine-to-frame connection that resists torque-induced flex, reduces wheel hop, and improves throttle response — all while maintaining enough compliance for everyday street driving.

Prothane brings over 30 years of polyurethane expertise and the distinction of being made in the USA. Their motor mount sets and inserts are engineered to application-specific tolerances and backed by a lifetime warranty, making them a favorite among restoration builders and performance enthusiasts who want durability they can count on.

NOLATHANE is an Australian suspension brand with a strong following among import and 4x4 enthusiasts. Their polyurethane engine mounts are formulated to handle the rigors of demanding driving conditions, offering excellent resistance to environmental degradation and a noticeable improvement in drivetrain stability.

For GM muscle car and performance builds, UMI Performance offers purpose-built engine mount solutions engineered specifically for street/strip applications. Their mounts are designed alongside full suspension systems, ensuring compatibility and performance gains for classic and modern GM platforms.