Engine Mounts

What This Collection Covers

Engine mounts are the isolating brackets that connect the engine block to the vehicle chassis, and their condition directly affects throttle response precision, driveline vibration, and accessory drive alignment under load. Factory rubber mounts prioritize vibration isolation for comfort at the cost of allowing the engine to move under hard acceleration and braking, which causes inconsistent driveline alignment, belt wear, and wheel hop on powerful front, rear, and all wheel drive builds. This collection spans direct fit replacement mounts, polyurethane and billet performance upgrades, and swap mount kits that let builders install an engine the chassis was not originally designed for.

Polyurethane Performance Mounts

Polyurethane engine mounts from Innovative Mounts, Kartboy, and Prothane replace factory rubber with a stiffer material available in a range of durometer ratings, reducing engine movement under load while keeping cabin noise and vibration at an acceptable level for street use.

Billet and Solid Mounts

Billet aluminum and solid mounts from UMI Performance and similar manufacturers virtually eliminate engine movement for maximum launch consistency and driveline alignment, at the cost of increased noise and vibration transmitted into the cabin, making them best suited to dedicated track and drag builds.

Sport Compact Engine Mount Platforms

Innovative Mounts and Kartboy offer extensive coverage for Honda Civic, Acura Integra and RSX, and Subaru WRX and STI, with B-series, D-series, H-series, and K-series specific mount kits in multiple bushing durometers to balance NVH against reduced torque steer and wheel hop.

Muscle Car and LS Swap Engine Mounts

UMI Performance and Prothane mounts for GM F-body and G-body platforms including Camaro, Firebird, and Chevelle reduce engine torque twist during hard acceleration, while ICT Billet and Energy Suspension LS swap mount kits provide bolt in LS engine placement in classic Camaro, Nova, and Chevelle chassis.

Jeep and Off-Road Engine Mounts

Innovative Mounts polyurethane engine mount kits for Jeep Wrangler JK and JKU improve engine stability during off-road articulation and towing without compromising daily street comfort.

Ford and Turbocharged Platform Engine Mounts

Cobb rear motor mounts for Ford Fiesta ST and Focus ST, along with Mazdaspeed3, and Cobb pitch stop mounts for Subaru platforms, reduce engine movement under boost and hard shifting to improve shift feel and reduce driveline shock on turbocharged applications.

Transmission and Trans Mount Pairings

Whiteline and Kartboy transmission mount bushings and complete trans mount sets are commonly paired with engine mount upgrades to fully stabilize the powertrain under load, particularly on manual transmission platforms where clutch engagement transmits significant torque shock to the mounts.

Top Engine Mount Brands

• Innovative Mounts. Polyurethane and steel swap mounts for Honda and Acura platforms
• Kartboy. Polyurethane engine and transmission mounts for Subaru
• Prothane. Polyurethane motor mount inserts for GM, Ford, and Mopar
• Energy Suspension. Polyurethane mounts and LS swap mount kits
• UMI Performance. Billet and polyurethane mounts for GM F-body and G-body
• Cobb. Rear motor mounts and pitch stop mounts for turbocharged platforms
• ICT Billet. LS swap mount kits for classic muscle car chassis
• Whiteline. Transmission mount bushings and matched sets

How to Choose the Correct Engine Mount

• Confirm the exact year, make, model, trim, and engine family
• Match bushing durometer to intended use (street comfort versus track stiffness)
• Verify mount position (front, rear, side, or transmission) matches the part number
• Confirm material type (polyurethane, billet aluminum, or steel) for the desired NVH level
• For engine swaps, verify the mount kit supports the specific donor engine and chassis combination
• Check whether mounting hardware and bushings are included or sold separately
• Confirm compatibility with existing transmission mount if only replacing engine mounts
• Verify ground clearance and header or oil pan clearance for swap mount kits
• Read fitment notes for any required chassis bracket or subframe modification
• Consider pairing engine and transmission mount upgrades together for balanced results

Common Questions

How do I know if my engine mounts are bad?

Worn engine mounts typically produce a noticeable clunk when engaging the clutch or releasing the brake on an automatic transmission vehicle, caused by the engine tipping under torque load and striking the engine bay sheet metal or adjacent chassis components. Excessive vibration at idle that reduces significantly with the vehicle in neutral also suggests failed rubber in the factory mounts.

Are polyurethane engine mounts street legal?

Yes, polyurethane engine mounts are fully street legal and do not affect emissions related systems or safety critical vehicle functions. The main practical concern is increased noise, vibration, and harshness transmitted into the cabin compared to factory rubber, which ranges from barely noticeable at lower durometer ratings to more pronounced at higher ratings.

What durometer rating should I choose for a daily driver?

Most manufacturers recommend a 60A to 75A durometer range for daily driven vehicles, which meaningfully reduces engine movement compared to factory rubber while keeping cabin noise and vibration at an acceptable level. Higher durometer ratings above 80A are best reserved for track or drag focused builds.

Do engine mounts reduce torque steer?

Yes, on front wheel drive platforms, stiffer engine mounts reduce torque steer under hard acceleration by keeping the engine positioned consistently relative to the drive axles, preventing the unpredictable steering pull that occurs when rubber mounts allow the engine to pitch under load.

What is a swap mount kit?

A swap mount kit bridges the dimensional gap between an aftermarket engine choice and the factory frame rail or subframe geometry of a chassis the engine was not originally designed for, most commonly used for LS engine swaps into classic muscle car platforms.

Do I need to replace all mounts at once?

It is not strictly required, but replacing all engine and transmission mounts together ensures even load distribution and prevents one old, sagging mount from concentrating additional stress on newly installed mounts. Many builders replace mounts as a complete set for this reason.

Can billet mounts damage my chassis?

Solid billet mounts transmit more shock directly into the chassis mounting points than rubber or polyurethane mounts, which is generally acceptable on purpose built race or drag chassis but can accelerate fatigue at mounting points on a stock unibody street car under sustained hard use.

How long does an engine mount replacement take?

A typical engine mount replacement on a single mount takes one to two hours with common hand tools and an engine support fixture or jack. Full engine and transmission mount kits, or swap mount installations, can take significantly longer depending on the complexity of the specific application.

Will stiffer engine mounts hurt fuel economy?

No, engine mount stiffness has no meaningful effect on fuel economy since it does not change engine operating parameters. Any change in perceived cabin noise or vibration is a comfort consideration rather than an efficiency one.

Do transmission mounts need to match engine mount brand?

Not necessarily, but many manufacturers offer matched engine and transmission mount kits engineered together for balanced stiffness and consistent NVH characteristics, which is generally recommended over mixing durometer ratings between engine and transmission mounts from different brands.

Why Buy Engine Mounts from Black Ops Auto Works

Black Ops Auto Works stocks 300 engine mount SKUs across sport compact, muscle car, Jeep, and turbocharged platforms with real fitment data, competitive pricing, and support from staff who build these vehicles themselves. Products are filterable by year, make, model, trim, and engine family to confirm the correct bushing durometer and mounting bracket before ordering.

For related upgrades, browse our engine, transmissions, Torque Solution, bushing kits, and suspension.