Upgrade your seventh-generation Honda Civic with the Innovative Mounts 90550 Steel K-Series Engine Swap Mount Kit, engineered for installing a compatible Honda K-Series engine and K20 manual transmission into the 2001–2005 Honda Civic Non-Si EM2 chassis.

Designed for enthusiasts replacing the factory D17 engine with Honda's popular K-Series platform, the Innovative Mounts 90550 provides the specialized engine and transmission mounting components required for a properly configured K20 or K24 engine conversion.

This kit requires a 2002–2006 Acura RSX or compatible 2002–2005 Honda Civic Si EP3 front subframe/rear crossmember assembly. It is not designed for installation using the original Non-Si Civic subframe.

The Innovative Mounts 90550 features durable steel construction, CAD/CAM-engineered mounting geometry, stress-analyzed components, and performance polyurethane bushings designed to reduce excessive drivetrain movement while maintaining consistent engine and transmission positioning.

Unlike some custom K-Series conversion arrangements, the 90550 is designed for a bolt-on mount installation without requiring hood notching or trimming when used with the appropriate drivetrain configuration.

Whether you're building a naturally aspirated K20-powered Civic, a high-torque K24 street car, or a custom turbocharged K-Series performance project, the Innovative Mounts 90550 provides a purpose-built mounting foundation for your engine swap.

Features

• 2001–2005 Honda Civic Non-Si Compatibility: Designed for the seventh-generation Civic EM2 chassis.

• K-Series Engine Conversion: Engineered for replacing the factory D17 engine with a compatible Honda K-Series powertrain.

• K20 Engine Compatibility: Designed around Honda K20 engine mounting specifications.

• K24 Engine Support: Compatible K24 engines can be installed with additional modifications and the required 2002–2006 CR-V engine-side post mount.

• K20 Manual Transmission Compatibility: Requires a compatible K20-style manual transmission.

• RSX/EP3 Subframe Requirement: Designed for use with the appropriate Acura RSX or Honda Civic Si EP3 subframe/rear crossmember.

• Four-Mount Configuration: Includes driver-side, passenger-side, front, and rear mounting positions.

• Steel Construction: Durable steel components designed for performance applications.

• Bolt-On Mounting Design: Engineered to install without custom fabrication of the supplied mounts when the required conversion components are used.

• No Hood Notching Required: Manufacturer-designed configuration does not require trimming or notching the hood.

• CAD/CAM Engineered: Developed for accurate fitment and consistent manufacturing quality.

• Stress-Analyzed Components: Designed to withstand demanding drivetrain loads.

• No-Tear Polyurethane Bushings: Help minimize excessive engine and transmission movement.

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

• Reduced Wheel Hop: Firmer mounts can help reduce unwanted drivetrain movement under load.

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

• Installation Hardware Included: Includes specified mounting hardware and reuses applicable OEM hardware.

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

Popular Performance Applications

2001–2005 Honda Civic K20 Engine Swaps

Provides the specialized mounting components needed for compatible K20-powered EM2 Civic conversions.

K24-Powered EM2 Civic Builds

Supports properly configured K24 installations using the required CR-V engine-side post mount and compatible K20 manual transmission.

Naturally Aspirated K-Series Performance

Suitable for compatible K-Series engines equipped with upgraded camshafts, intake manifolds, headers, and supporting performance components.

Turbocharged K-Series Civic Builds

Performance polyurethane bushings help reduce excessive drivetrain movement in properly configured forced-induction applications.

Automatic-to-Manual K-Series Conversions

Provides the mounting foundation for compatible originally automatic Civic chassis being converted to a K-Series manual drivetrain.

Street Performance Builds

Multiple bushing hardness options allow enthusiasts to select their preferred balance of drivetrain rigidity and everyday comfort.

Drag Racing Applications

Firmer polyurethane bushings help maintain drivetrain stability during aggressive acceleration and launches.

Autocross and Road Racing

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

Additional Information

• Manufacturer: Innovative Mounts
• Part Number: 90550
• Product Type: Steel K-Series Engine Swap Mount Kit
• Vehicle Application: 2001–2005 Honda Civic Non-Si
• Chassis Compatibility: EM2
• Original Engine: Honda D17-Series
• Engine Compatibility: Compatible Honda K20 / K24
• Transmission Compatibility: K20-Style Manual
• Original Chassis Transmission: Manual or Automatic
• Required Subframe: Acura RSX DC5 / Compatible Civic Si EP3
• K24 Engine Requirement: 2002–2006 Honda CR-V Engine-Side Post Mount
• Mount Construction: Steel
• Bushing Material: Performance Polyurethane
• Available Bushing Hardness Options: 75A / 85A / 95A
• Mounting Configuration: Four-Mount System
• Engineering: CAD/CAM Designed and Stress Analyzed
• Installation Type: K-Series Engine Swap Conversion
• Manufacturer-Listed Weight: Approximately 25 lbs
• Warranty: Manufacturer Lifetime Warranty, Subject to Terms

Available Polyurethane Bushing Hardness Options

75A – Black – Street / Performance

The softest available option for the 90550.

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 manufacturer selection guidelines rather than guaranteed load ratings.

Important: Firmer polyurethane bushings generally increase noise, vibration, and harshness transmitted into the vehicle cabin.

Common Reasons for Replacement or Upgrade

• K-Series Engine Conversion: Provides specialized mounting components for installing a compatible K20 or K24 engine into the seventh-generation Civic.

• D17-to-K-Series Upgrade: Allows builders to replace the factory D-Series drivetrain with a performance-oriented K-Series powertrain.

• K20 Manual Transmission Installation: Supports compatible K20-style manual transmission configurations.

• K24 Engine Conversion: Accommodates compatible K24 engines with the required CR-V post mount and supporting modifications.

• Automatic-to-Manual Conversion: Supports the mounting requirements of compatible originally automatic Civic chassis.

• Improved Drivetrain Stability: Helps reduce excessive engine movement during acceleration.

• Reduced Mount Deflection: Provides firmer engine support compared with conventional rubber mounts.

• Improved Drivetrain Response: Helps maintain more consistent engine positioning under load.

• Reduced Wheel Hop: Firmer mounts can help limit excessive drivetrain movement.

• Performance Engine Builds: Suitable for compatible naturally aspirated and turbocharged K-Series applications.

Installation Notes

1. Verify Vehicle Compatibility: Confirm that the vehicle is a supported 2001–2005 Honda Civic Non-Si EM2.

2. Confirm Subframe Compatibility: Verify that the appropriate Acura RSX or Civic Si EP3 subframe/rear crossmember assembly is installed or available for the conversion.

3. Verify Engine Compatibility: Identify the exact Honda K20 or K24 engine being installed.

4. Confirm Transmission Compatibility: Verify that the selected transmission is a compatible K20-style manual transmission.

5. Check K24 Engine Requirements: When installing a compatible K24 engine, obtain the required 2002–2006 Honda CR-V engine-side post mount and verify any additional modifications.

6. Plan the Complete K-Series Conversion: Obtain the engine, transmission, axles, intermediate shaft, shifter, wiring, ECU, cooling system, and other supporting components.

7. Prepare Automatic Chassis Components if Applicable: Originally automatic vehicles require additional manual conversion components.

8. Inspect Factory Mounting Locations: Check the chassis brackets, frame rails, and subframe mounting points for damage or corrosion.

9. Support the Vehicle and Drivetrain: Use appropriate lifting equipment and engine support tools.

10. Install the Required Subframe: Verify correct steering, suspension, and rear crossmember compatibility.

11. Remove the Factory D17 Drivetrain: Follow applicable Honda service procedures.

12. Prepare the K-Series Engine: Install the correct engine-side mounting brackets and supporting swap components.

13. Install the Innovative Mounts Components: Position the engine, transmission, front, and rear mounts according to the manufacturer's instructions.

14. Install the Required Sub-Brackets: Secure the application-specific engine and transmission mounting brackets.

15. Verify Engine and Transmission Positioning: Ensure the drivetrain is properly aligned and the mounts are not binding.

16. Inspect Axle Fitment: Confirm proper axle engagement, operating angles, and clearance.

17. Check Engine Bay Clearance: Verify clearance around the subframe, steering components, exhaust system, intake components, and surrounding accessories.

18. Complete Supporting Systems: Install and verify the ECU, wiring, cooling, fuel, clutch, and shifter components.

19. Torque Mounting Hardware: Follow Innovative Mounts' installation instructions and applicable Honda factory torque specifications.

20. Perform a Final Inspection: Check all mounting hardware, drivetrain clearances, fluid connections, and transmission operation before driving.

21. Check for Excessive Vibration: Some increase in vibration is normal with performance polyurethane mounts, particularly with firmer bushing options.

22. Recheck After Initial Use: Inspect mounting hardware and drivetrain components after the initial driving period.

Professional installation is strongly recommended, as K-Series engine conversions involving subframe changes require careful drivetrain and chassis integration.

What's Included

The Innovative Mounts 90550 includes the following mounting components:

• 1 × Front Engine Mount – 90640

• 1 × Engine Block Mount – 90520

• 1 × Engine Block Mounting Bracket – 90520-SB

• 1 × Transmission Mount – 10510

• 1 × Transmission Mounting Bracket – 90510-SB

• 1 × Rear Engine Mount – 90630

• Performance polyurethane bushings in the selected hardness configuration

Included Hardware

• 1 × M12 × 1.25 × 100 mm Bolt

• 1 × M12 × 1.25 × 90 mm Bolt

• 1 × M12 × 1.25 × 35 mm Bolt

• 2 × M12 × 1.25 × 30 mm Bolts

• 8 × 12 mm Washers

• 3 × 12 mm Nuts

Applicable factory OEM hardware is also reused during installation.

Additional Components Required

The following components are not included unless separately specified:

• Honda K20 or K24 engine

• Compatible K20-style manual transmission

• Acura RSX DC5 or compatible Civic Si EP3 subframe/rear crossmember

• Compatible steering and suspension conversion components

• 2002–2006 Honda CR-V engine-side post mount for K24 applications

• Clutch and flywheel

• Axles and intermediate shaft

• Shifter and shift linkage components

• ECU and wiring conversion components

• Cooling system modifications

• Fuel system components

• Intake and exhaust components

• Manual conversion components for vehicles originally equipped with automatic transmissions

Upgrade your seventh-generation Honda Civic with the Innovative Mounts 90550 Steel K-Series Engine Swap Mount Kit, engineered for 2001–2005 Non-Si EM2 applications using compatible Honda K-Series engines, K20-style manual transmissions, and the required Acura RSX or Civic Si EP3 subframe.

Featuring durable steel construction, CAD/CAM engineering, stress-analyzed components, performance polyurethane bushings, and a complete four-position mounting system, the 90550 provides the drivetrain support needed for a properly configured K-Series conversion.

Whether you're building a naturally aspirated K20-powered Civic, a high-torque K24 street car, or a turbocharged K-Series racing project, Innovative Mounts delivers a purpose-built mounting solution for your build.