Engineered for vehicles equipped with Honda K-Series engines and compatible manual or automatic transmissions, the Innovative Mounts 90630 replaces the factory rubber mounting arrangement with a durable steel mount assembly featuring a performance polyurethane bushing.

Factory engine mounts are designed to absorb vibration and provide a comfortable driving experience. However, aging rubber mounts can crack, deteriorate, or separate over time, allowing excessive engine movement during acceleration, deceleration, and shifting.

The Innovative Mounts 90630 provides increased resistance to drivetrain movement, helping maintain more consistent engine and transmission positioning under load. Its firmer polyurethane construction can also help reduce unwanted drivetrain rocking and wheel hop during aggressive driving.

Featuring solid steel construction, a durable powder-coated finish, and Innovative Mounts' no-tear polyurethane bushing design, the 90630 is an excellent upgrade for daily-driven performance vehicles, modified K-Series engines, and dedicated motorsport applications.

Important: Part number 90630 is an individual rear engine mount, not a complete engine mount kit or K-Series engine swap conversion kit.

Features

• Direct-Replacement Design: Replaces the factory rear engine mount on compatible Acura RSX and Honda Civic EP3 applications.

• 2002–2006 Acura RSX Compatibility: Designed for supported RSX Base and Type-S models.

• 2002–2005 Honda Civic Si/Type-R Compatibility: Fits supported EP3 chassis applications.

• Honda K-Series Engine Compatibility: Designed for compatible factory K-Series engine configurations.

• Manual and Automatic Transmission Support: Compatible with supported manual and automatic drivetrain applications.

• Rear Mounting Position: Replaces the factory rear engine mount.

• Solid Steel Construction: Durable mounting components engineered for performance driving.

• Powder-Coated Finish: Helps protect the steel mount against corrosion.

• Performance Polyurethane Bushing: Provides increased resistance to drivetrain movement compared with conventional rubber mounts.

• No-Tear Bushing Design: Engineered to minimize excessive drivetrain movement while providing vibration isolation.

• Improved Drivetrain Stability: Helps control engine rocking during acceleration and shifting.

• Reduced Mount Deflection: Maintains more consistent engine and transmission positioning under load.

• Improved Drivetrain Response: Firmer mounting can provide a more connected drivetrain feel.

• Potential Wheel Hop Reduction: Reduced drivetrain movement may help minimize wheel hop during hard acceleration.

• Multiple Bushing Hardness Options: Available in 75A, 85A, and 95A polyurethane configurations.

• Individual Replacement Mount: Allows upgrading the rear mount without purchasing a complete mount kit.

• Complete Mount Kit Compatibility: Used in Innovative Mounts' compatible RSX and Civic EP3 replacement mount systems.

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

Popular Performance Applications

Acura RSX Base and Type-S Performance Builds

Provides firmer rear engine mounting for compatible RSX applications equipped with Honda K-Series engines.

Honda Civic Si EP3 Upgrades

Replaces the factory rear engine mount with a performance-oriented polyurethane mounting solution.

Naturally Aspirated K-Series Builds

Suitable for vehicles equipped with upgraded intake manifolds, headers, camshafts, and other naturally aspirated performance components.

Turbocharged K-Series Applications

Helps control excessive drivetrain movement in properly configured forced-induction applications.

Daily-Driven Performance Vehicles

The 75A bushing option provides increased drivetrain rigidity while retaining some vibration isolation for street-oriented builds.

Autocross and Road Racing

Reduced mount deflection helps maintain more consistent drivetrain positioning during acceleration, braking, and cornering.

Drag Racing Applications

Firmer polyurethane bushings help resist excessive engine movement during aggressive launches.

Worn Factory Mount Replacement

An ideal upgrade when the original rubber rear engine mount has deteriorated, separated, or begun allowing excessive drivetrain movement.

Additional Information

• Manufacturer: Innovative Mounts
• Part Number: 90630
• Product Type: Rear Engine Mount
• Mounting Position: Rear
• Vehicle Application: 2002–2006 Acura RSX / 2002–2005 Honda Civic Si/Type-R
• Chassis Compatibility: DC5 / EP3
• Engine Compatibility: Honda K-Series
• Transmission Compatibility: Manual or Automatic
• Mount Construction: Steel
• Finish: Powder-Coated
• Bushing Material: Performance Polyurethane
• Available Bushing Hardness Options: 75A / 85A / 95A
• OEM Replacement Reference: 50810-S7C-003
• Complete Manual Mount Kit Reference: Innovative Mounts 90650
• Complete Automatic Mount Kit Reference: Innovative Mounts 90651
• Billet Aluminum Alternative: Innovative Mounts B90630
• Manufacturer-Listed Weight: Approximately 6 lbs
• Warranty: Manufacturer Lifetime Warranty, Subject to Terms

Available Polyurethane Bushing Hardness Options

75A – Black – Street / Performance

The softest available bushing option for the 90630.

Recommended for performance-oriented street vehicles where improved drivetrain stability is desired while retaining some vibration isolation.

Manufacturer horsepower guidance: approximately 250–400 HP.

85A – Grey – Performance / Race

Provides increased drivetrain rigidity for modified engines, aggressive driving, and competition applications.

Manufacturer horsepower guidance: approximately 400–500 HP.

95A – Red – Extreme Race

The stiffest available polyurethane option, intended for high-output engines and dedicated racing applications.

Manufacturer horsepower guidance: 500+ HP.

These horsepower ranges are general manufacturer selection guidelines rather than guaranteed load ratings.

Important: Increasing bushing hardness generally increases noise, vibration, and harshness transmitted into the vehicle cabin. Select the appropriate bushing based on the vehicle's intended use and desired comfort level.

Innovative Mounts 90630 vs. B90630 vs. 90650

Innovative Mounts 90630: Steel rear engine mount for compatible Acura RSX and Honda Civic EP3 applications with manual or automatic transmissions.

Innovative Mounts B90630: Billet aluminum version of the rear engine mount.

Innovative Mounts 90650: Complete steel replacement engine mount kit for supported manual-transmission Acura RSX and Honda Civic EP3 applications.

Innovative Mounts 90651: Steel replacement mount kit for supported automatic-transmission applications.

The 90630 is an excellent choice when replacing or upgrading only the rear engine mount.

Common Reasons for Replacement

• Cracked Factory Rubber: Aging rubber can deteriorate and allow excessive engine movement.

• Separated Mount Bushing: Worn factory mounts may develop excessive movement under load.

• Excessive Engine Rocking: Firmer polyurethane helps control unwanted drivetrain movement.

• Clunking During Acceleration: A worn rear engine mount may allow excessive movement that results in noticeable drivetrain noise.

• Clunking During Gear Changes: Excessive drivetrain movement can contribute to noticeable movement during shifting.

• Reduced Drivetrain Stability: Performance polyurethane helps maintain more consistent engine positioning.

• Performance Engine Upgrades: Modified K-Series engines can benefit from firmer drivetrain mounting.

• Track and Racing Applications: Provides increased mount rigidity for demanding driving conditions.

• Individual Mount Replacement: Allows replacement of the rear mount without purchasing a complete mount kit.

Installation Notes

1. Verify Vehicle Compatibility: Confirm that the vehicle is a supported 2002–2006 Acura RSX or 2002–2005 Honda Civic Si/Type-R EP3.

2. Confirm Engine Configuration: Verify that the vehicle is equipped with a compatible Honda K-Series engine and rear mounting arrangement.

3. Verify Mounting Position: The 90630 replaces the factory rear engine mount.

4. Inspect the Existing Mount: Check the factory rear mount for cracked rubber, separation, corrosion, or excessive movement.

5. Support the Drivetrain: Properly support the engine and transmission before removing the original rear mount.

6. Remove the Factory Mount: Follow the applicable Honda or Acura service procedures.

7. Inspect Mounting Locations: Check the chassis and subframe mounting points for damage or corrosion.

8. Position the Innovative Mounts 90630: Install the replacement mount in the factory rear mounting location.

9. Verify Mount Alignment: Ensure the mount and surrounding brackets are properly aligned without excessive preload or binding.

10. Install the Required Hardware: Use the hardware specified by Innovative Mounts and reuse applicable factory fasteners where instructed.

11. Torque Mounting Fasteners: Follow the applicable factory service manual and Innovative Mounts installation instructions.

12. Inspect Drivetrain Clearance: Verify that the engine and transmission do not contact surrounding chassis components.

13. Check for Additional Vibration: Some increase in vibration is normal when upgrading from factory rubber mounts to performance polyurethane.

14. Perform a Final Inspection: Verify proper mounting alignment and secure hardware before operating the vehicle.

15. Recheck After Initial Use: Inspect the mount and mounting hardware after the initial driving period.

Important: Innovative Mounts advises that installed mounts showing bolt impressions cannot be returned or exchanged. Confirm fitment before installation.

Professional installation is recommended.

What's Included

The Innovative Mounts 90630 includes:

• 1 × Innovative Mounts 90630 Steel Rear Engine Mount Assembly

• 1 × Performance Polyurethane Bushing in the selected hardness configuration

Additional Information

This listing is for the individual rear engine mount only.

The following components are not included unless separately specified:

• Driver-side transmission mount

• Passenger-side engine mount

• Front engine mount

• Complete Innovative Mounts 90650 or 90651 mount kit

• Engine or transmission components

• Additional mounting hardware not specified by the manufacturer

Verify any required mounting hardware against the manufacturer packaging and installation instructions.

Upgrade your Acura RSX or Honda Civic Si with the Innovative Mounts 90630 Steel Rear Engine Mount, engineered for 2002–2006 Acura RSX DC5 and 2002–2005 Honda Civic Si/Type-R EP3 applications equipped with compatible Honda K-Series engines and manual or automatic transmissions.

Featuring durable steel construction, a protective powder-coated finish, performance polyurethane bushings, and a direct-replacement mounting design, the 90630 provides improved drivetrain stability and reduced excessive engine movement compared with worn factory rubber mounts.

Whether you're replacing a deteriorated OEM mount, upgrading a daily-driven K-Series vehicle, or preparing for aggressive track use, Innovative Mounts delivers a dependable performance mounting solution.