Factory engine mounts use relatively soft rubber components to isolate engine vibrations from the chassis. While effective for everyday comfort, these mounts can deteriorate over time or allow excessive drivetrain movement under aggressive acceleration, hard shifting, and high-performance driving.

Innovative Mounts addresses these limitations with durable steel mounting brackets and specially engineered polyurethane bushings. The stiffer mounting system helps minimize unwanted engine movement, reduce wheel hop, and improve throttle response by keeping the engine and transmission more securely positioned during acceleration and gear changes.

Each mount features solid steel construction with a durable black powder-coated finish for corrosion resistance and long-lasting performance. Innovative Mounts uses CAD/CAM design and stress analysis to develop mounts capable of handling demanding performance applications.

Available with multiple polyurethane bushing hardness options, the Innovative Mounts 90650 kit allows enthusiasts to select the appropriate balance of vibration isolation and drivetrain rigidity for their specific build.

Whether you're replacing worn factory mounts, upgrading your daily-driven RSX Type-S, or preparing your EP3 Civic Si for increased horsepower, this mount kit provides the durability and performance needed for a more responsive driving experience.

Features

• Complete Performance Engine Mount Kit: Replaces the primary factory engine and transmission mounts on compatible K-series applications.

• Heavy-Duty Steel Construction: Strong steel mounting brackets engineered for increased durability and drivetrain support.

• Reduced Engine Movement: Helps minimize excessive engine and transmission movement during acceleration, deceleration, and shifting.

• Improved Power Transfer: Firmer mounting characteristics help reduce drivetrain deflection under load.

• Reduced Wheel Hop: Helps limit unwanted drivetrain movement that can contribute to wheel hop during aggressive acceleration.

• Polyurethane Bushings: Innovative Mounts' specially engineered no-tear bushings provide improved durability compared with deteriorated factory rubber mounts.

• Multiple Bushing Hardness Options: Available in different durometer ratings to accommodate street, track, and high-horsepower applications.

• Black Powder-Coated Finish: Provides corrosion resistance and a clean, professional appearance.

• CAD/CAM Designed: Developed using computer-aided design and stress analysis.

• Manual Transmission Compatibility: Designed for compatible K-series manual transmission applications.

• RSX Type-S Compatible: Suitable for the factory K20A2 and K20Z1-powered RSX Type-S.

• K24 Engine Compatibility: Can accommodate certain K24 engine configurations when using the required K20-style engine-side post mount and compatible transmission.

• Lifetime Manufacturer Warranty: Backed by Innovative Mounts' lifetime warranty, subject to manufacturer terms.

Popular Performance Applications

Acura RSX Type-S Performance Builds

An excellent upgrade for K20A2 and K20Z1-powered RSX Type-S vehicles seeking improved drivetrain stability and reduced engine movement during spirited driving.

Honda Civic Si EP3 Upgrades

Provides improved engine support for EP3 Civic Si owners replacing worn factory mounts or upgrading their vehicle for increased performance.

Turbocharged K-Series Applications

Helps control excessive drivetrain movement in turbocharged K20 and compatible K24 builds producing substantially more torque than factory configurations.

Naturally Aspirated Performance Builds

Ideal for enthusiasts upgrading intake, exhaust, engine management, and internal engine components while seeking improved drivetrain response.

Track and Autocross Applications

Stiffer polyurethane bushings help maintain engine positioning during aggressive acceleration, braking, and cornering.

K24 Engine Upgrades

Can support select K24 engine installations in compatible RSX and EP3 chassis when the appropriate K20-style engine-side post mount and transmission configuration are used.

Additional Information

• Manufacturer: Innovative Mounts
• Part Number: 90650
• Product Type: Performance Engine and Transmission Mount Kit
• Mount Construction: Steel
• Finish: Black Powder Coat
• Bushing Material: Polyurethane
• Transmission Compatibility: K-Series Manual Transmission
• Chassis Compatibility: Acura RSX DC5 / Honda Civic Si EP3
• Engine Compatibility: K20 Series / Select K24 Configurations
• Mounting Configuration: Driver-Side Transmission Mount, Passenger-Side Engine Mount, and Rear Engine Mount
• Front Engine Mount: Available Separately – Innovative Mounts 90640
• Billet Aluminum Alternative: Innovative Mounts B90650
• Manufacturer Warranty: Lifetime Limited Warranty

Available Bushing Hardness Options:

• 75A – Black: Street/performance applications; manufacturer-recommended range of approximately 250–400 HP.

• 85A – Gray: Track/performance applications; manufacturer-recommended range of approximately 400–500 HP.

• 95A – Red: Race/high-horsepower applications; manufacturer-recommended range of 500+ HP.

Bushing recommendations are general manufacturer guidelines. Actual selection should also consider vehicle usage, torque output, drivetrain configuration, and acceptable vibration levels.

Common Reasons for Replacement

• Worn Factory Engine Mounts: Deteriorated rubber mounts can allow excessive engine movement and vibration.

• Excessive Drivetrain Movement: Engine rocking during acceleration and shifting can negatively affect vehicle response.

• Wheel Hop During Acceleration: Firmer mounts help reduce drivetrain movement associated with wheel hop.

• High-Horsepower Engine Builds: Increased engine torque can place additional stress on factory mounting components.

• Inconsistent Shifting Feel: Excessive engine movement may contribute to drivetrain movement during gear changes.

• Broken or Torn Mount Bushings: Replace damaged factory mounts with a more durable performance-oriented system.

• Track and Competition Use: Improve drivetrain stability during demanding performance driving.

• K-Series Engine Upgrades: Provide stronger engine support when upgrading or replacing factory K-series engines.

Installation Notes

1. Verify Vehicle Fitment: Confirm your vehicle is a compatible 2002–2006 Acura RSX or 2002–2005 Honda Civic Si EP3 equipped with a supported K-series engine and manual transmission.

2. Support the Engine and Transmission: Properly support the drivetrain before removing the factory engine mounts to prevent damage or unexpected movement.

3. Remove Factory Mounts: Carefully remove the original engine and transmission mounts following the appropriate Honda or Acura service procedures.

4. Inspect Mounting Locations: Check the chassis mounting points, engine brackets, transmission mounting surfaces, and factory hardware for damage or excessive wear.

5. Install Innovative Mounts: Position the replacement mounts according to the manufacturer's installation instructions, ensuring correct orientation and alignment.

6. K24 Engine Installations: When installing a compatible K24 engine, use the required Honda/Acura K20-style engine-side post mount. Verify the transmission and mounting configuration before installation.

7. Select the Appropriate Bushing Hardness: Choose the polyurethane bushing durometer that best matches the vehicle's intended use and acceptable vibration level.

8. Align the Drivetrain: Ensure the engine and transmission are properly positioned before final tightening to avoid unnecessary mount preload.

9. Torque Mounting Hardware: Tighten all mounting hardware according to the applicable manufacturer specifications. Do not overtighten or improperly preload the mounts.

10. Check Component Clearance: Verify adequate clearance around the engine, transmission, exhaust system, intake components, and surrounding chassis components.

11. Expect Increased Vibration: Performance polyurethane mounts generally transmit more engine vibration into the cabin than factory rubber mounts, particularly with higher-durometer bushings.

12. Inspect After Installation: Recheck mounting hardware, alignment, and surrounding component clearances after the initial driving period.

13. Professional Installation Recommended: Installation by an experienced Honda/Acura performance technician is strongly recommended.

14. Confirm Fitment Before Bolting Down: Innovative Mounts advises that mounts showing installation bolt impressions cannot be returned or exchanged. Verify compatibility before installation.

What's Included

• (1) Driver-Side Transmission Mount

• (1) Passenger-Side Engine Mount

• (1) Rear Engine Mount

• Polyurethane Bushings Installed in the Mount Assemblies

Important: The optional Innovative Mounts 90640 front engine mount is sold separately. Additional factory mounting hardware or engine-specific brackets may be required depending on the installation.

Upgrade your K-series drivetrain with the Innovative Mounts Steel Engine Mount Kit (90650), engineered specifically for compatible 2002–2006 Acura RSX and 2002–2005 Honda Civic Si EP3 manual transmission applications.

Featuring heavy-duty steel construction, durable polyurethane bushings, a corrosion-resistant powder-coated finish, and multiple bushing hardness options, this mount kit provides improved drivetrain stability, reduced engine movement, and more responsive power delivery.

Whether you're restoring an aging RSX, upgrading your EP3 Civic Si, or building a high-horsepower K-series performance vehicle, Innovative Mounts delivers the strength, durability, and precision enthusiasts demand.