Engineered as a direct replacement for the factory rear differential mounting components, the Innovative Mounts 90755 provides improved differential stability, reduced excessive drivetrain movement, and increased mounting rigidity compared with worn factory rubber mounts.

The Honda S2000's rear-wheel-drive configuration relies on secure differential mounting to maintain consistent drivetrain positioning during acceleration, deceleration, and aggressive driving. Over time, factory rubber differential mounts can deteriorate, crack, or soften, allowing excessive movement under load.

This unwanted movement can contribute to drivetrain clunking, inconsistent power delivery, and increased stress on surrounding drivetrain components.

The Innovative Mounts 90755 addresses these concerns with a complete four-piece steel rear differential mounting system featuring performance polyurethane bushings. These bushings help reduce excessive differential movement while maintaining a degree of vibration isolation.

Unlike conventional rubber mounts, polyurethane bushings offer increased resistance to deflection, helping maintain more consistent differential positioning during demanding driving conditions.

Featuring CAD/CAM-engineered components, stress-analyzed construction, and Innovative Mounts' no-tear polyurethane bushing design, the 90755 is an excellent upgrade for daily-driven S2000s, naturally aspirated performance builds, supercharged and turbocharged applications, and dedicated motorsport vehicles.

Important: Part number 90755 is a complete rear differential mount replacement kit. It does not include engine mounts or the rear transmission mount.

Features

• 2000–2009 Honda S2000 Compatibility: Designed for AP1 and AP2 chassis.

• Complete Rear Differential Mount Kit: Includes four rear differential mounting components.

• Direct-Replacement Design: Replaces the factory rear differential mounts without requiring a custom differential mounting system.

• Durable Steel Construction: Provides increased mounting rigidity for demanding performance applications.

• Performance Polyurethane Bushings: Help reduce excessive differential movement compared with conventional rubber mounts.

• No-Tear Bushing Design: Engineered to resist excessive drivetrain movement while maintaining some vibration isolation.

• CAD/CAM Engineered: Designed for accurate fitment and consistent mounting geometry.

• Stress-Analyzed Components: Developed for demanding drivetrain loads.

• Improved Differential Stability: Helps control unwanted differential movement during acceleration and deceleration.

• Reduced Mount Deflection: Maintains more consistent differential positioning under load.

• Improved Drivetrain Response: Firmer mounting can provide a more connected driving experience.

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

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

• Factory Hardware Compatibility: Designed to reuse applicable original Honda mounting hardware.

• Street and Racing Applications: Suitable for properly configured daily-driven, autocross, road racing, and drag racing vehicles.

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

Popular Performance Applications

Honda S2000 AP1 Performance Builds

Provides upgraded rear differential mounting for F20C-powered S2000 applications.

Honda S2000 AP2 Performance Builds

Replaces the factory differential mounts on compatible F22C1-powered vehicles.

Naturally Aspirated F20C/F22C Builds

Suitable for S2000s equipped with performance intake systems, headers, exhaust components, camshafts, and other naturally aspirated upgrades.

Supercharged Honda S2000 Applications

Helps control excessive differential movement in properly configured supercharged builds.

Turbocharged Honda S2000 Applications

Provides increased differential mounting rigidity for modified forced-induction applications.

Daily-Driven Performance Vehicles

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

Autocross and Road Racing

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

Drag Racing Applications

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

Worn Factory Differential Mount Replacement

An excellent upgrade when the original rubber differential mounts have deteriorated, separated, or begun allowing excessive movement under load.

Additional Information

• Manufacturer: Innovative Mounts
• Part Number: 90755
• Product Type: Steel Rear Differential Mount Kit
• Vehicle Application: 2000–2009 Honda S2000
• Chassis Compatibility: AP1 / AP2
• Engine Compatibility: Honda F20C / F22C1
• Transmission Compatibility: Factory-Style Manual Drivetrain
• Drivetrain Configuration: Rear-Wheel Drive
• Mounting Location: Rear Differential
• Mount Construction: Steel
• Bushing Material: Performance Polyurethane
• Available Bushing Hardness Options: 75A / 85A / 95A
• Mounting Configuration: Four Rear Differential Mounts
• Installation Type: Direct Replacement
• Engineering: CAD/CAM Designed and Stress Analyzed
• Mounting Hardware: Reuses Applicable Factory Honda Hardware
• Manufacturer-Listed Weight: Approximately 10 lbs

OEM Replacement Part Numbers:

• 50710-S2A-000

• 50730-S2A-003

• 50730-S2A-023

• 50740-S2A-003

• 50740-S2A-023

Billet Aluminum Alternative: Innovative Mounts B90755

Related Engine Mount Kit: Innovative Mounts 90750

Warranty: Manufacturer Lifetime Warranty, Subject to Terms

Available Polyurethane Bushing Hardness Options

75A – Black – Street / Performance

The softest of the three standard bushing options.

Recommended for daily-driven and performance-oriented Honda S2000 applications where improved differential stability is desired while retaining some vibration isolation.

Manufacturer horsepower guidance: approximately 250–400 HP.

85A – Grey – Performance / Race

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

Manufacturer horsepower guidance: approximately 400–500 HP.

95A – Red – Extreme Race

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

Manufacturer horsepower guidance: 500+ HP.

These horsepower ranges are general manufacturer bushing selection guidelines rather than guaranteed load ratings or minimum horsepower requirements.

Important: Increasing bushing hardness generally increases noise, vibration, and harshness transmitted into the vehicle cabin. The 75A option is typically the most appropriate starting point for a street-driven S2000.

Innovative Mounts 90755 vs. B90755

Innovative Mounts 90755 – Steel Rear Differential Mount Kit

• Steel mounting construction

• Designed for 2000–2009 Honda S2000 AP1/AP2

• Includes four rear differential mounts

• Direct-replacement configuration

• Performance polyurethane bushings

• Available in 75A, 85A, and 95A configurations

Innovative Mounts B90755 – Billet Aluminum Rear Differential Mount Kit

• Billet aluminum mounting construction

• Designed for 2000–2009 Honda S2000 AP1/AP2

• Includes four rear differential mounts

• Direct-replacement configuration

• Performance polyurethane bushings

• Available in multiple bushing configurations

Both kits are designed to improve differential mounting rigidity. The primary distinction is the construction material and mounting assembly design.

Innovative Mounts 90755 vs. 90750

Innovative Mounts 90750 – Steel Engine & Transmission Mount Kit

Replaces the primary engine and transmission mounting components on compatible Honda S2000 applications.

Innovative Mounts 90755 – Steel Rear Differential Mount Kit

Replaces the four rear differential mounting components.

Important: These kits serve different mounting locations and can be used together to upgrade the engine, transmission, and rear differential mounting systems.

Common Reasons for Replacement

• Cracked Factory Rubber: Aging differential mount bushings can deteriorate and allow excessive movement.

• Separated Differential Bushings: Worn mounts may develop excessive deflection under load.

• Excessive Differential Movement: Firmer polyurethane helps control unwanted differential rocking.

• Drivetrain Clunking: Worn differential mounts can contribute to noticeable noise during acceleration and deceleration.

• Wheel Hop During Acceleration: Excessive differential movement can contribute to wheel hop in certain driving conditions.

• Inconsistent Drivetrain Response: Performance polyurethane helps maintain more consistent differential positioning.

• Performance Engine Upgrades: Modified F20C and F22C engines can benefit from firmer differential mounting.

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

• Preventive Maintenance: Replaces aging factory rubber mounts before excessive deterioration occurs.

• Complete Differential Mount Upgrade: Replaces all four rear differential mounting positions together.

Installation Notes

1. Verify Vehicle Compatibility: Confirm that the vehicle is a 2000–2009 Honda S2000 AP1 or AP2 with a compatible rear differential mounting configuration.

2. Inspect the Existing Mounts: Check the factory rear differential mounts for cracked rubber, separation, corrosion, or excessive movement.

3. Prepare the Vehicle: Safely raise and support the vehicle using appropriate lifting equipment and jack stands.

4. Support the Rear Differential: Properly support the differential assembly before removing the factory mounting components.

5. Remove the Factory Mounts: Follow the applicable Honda S2000 factory service procedures.

6. Inspect Mounting Locations: Check the rear differential housing, mounting brackets, and surrounding chassis components for damage or corrosion.

7. Install the Innovative Mounts 90755 Components: Position the replacement mounts in the appropriate factory differential mounting locations.

8. Verify Mount Orientation: Ensure each mounting component is installed in the correct position and orientation.

9. Verify Differential Alignment: Confirm the differential is properly positioned without excessive mount preload or binding.

10. Install the Required Hardware: Reuse applicable factory Honda mounting hardware as specified by Innovative Mounts.

11. Torque Mounting Fasteners: Follow the Honda S2000 factory service manual and Innovative Mounts installation instructions.

12. Inspect Drivetrain Clearance: Verify adequate clearance around the differential, driveshaft, axles, exhaust, and surrounding chassis components.

13. Check for Additional Vibration: Some increase in noise, vibration, and harshness 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 differential mounts and mounting hardware after the initial driving period.

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

Professional installation is recommended.

What's Included

The Innovative Mounts 90755 steel rear differential mount kit includes:

• 4 × Rear Differential Mounting Components

• Performance polyurethane bushings in the selected hardness configuration

The manufacturer's catalog identifies the steel differential mounting components as:

• Innovative Mounts 90755A

• Innovative Mounts 90755L

• Innovative Mounts 90755R

These components make up the complete four-position rear differential mounting system.

Additional Information

This listing is for the rear differential mounting kit only.

The following components are not included unless separately specified:

• Rear differential assembly

• Engine mounts

• Transmission mounts

• Driveshaft

• Axles

• Differential mounting hardware beyond the specified kit contents

The kit is designed to reuse applicable factory Honda hardware. Verify the supplied components against the manufacturer packaging and installation instructions.

Upgrade your Honda S2000 with the Innovative Mounts 90755 Steel Rear Differential Mount Kit, engineered specifically for 2000–2009 Honda S2000 AP1 and AP2 applications.

Featuring durable steel construction, CAD/CAM engineering, stress-analyzed components, performance polyurethane bushings, and a direct-replacement design, the 90755 provides improved differential stability and reduced excessive drivetrain movement compared with worn factory rubber mounts.

Whether you're replacing deteriorated OEM differential mounts, upgrading a daily-driven S2000, or preparing a naturally aspirated or forced-induction performance build, Innovative Mounts delivers a dependable rear differential mounting solution.