Transform your sixth-generation Honda Civic with the Innovative Mounts B90051 Billet Aluminum K-Series Engine Conversion Mount Kit, engineered for 1996–2000 Honda Civic EK, EJ, and EM chassis undergoing a Honda K20 or compatible K24 engine swap using a 1992–1995 Civic EG-style front subframe and rear crossmember.

Designed for enthusiasts upgrading from the factory D-Series or B-Series drivetrain to a Honda K-Series engine, the Innovative Mounts B90051 provides the specialized engine and transmission mounting components necessary to position a compatible K-Series drivetrain within the sixth-generation Civic chassis.

The 1996–2000 Honda Civic remains one of the most popular platforms for K-Series engine conversions thanks to its lightweight construction, extensive aftermarket support, and proven performance potential. Installing a K20 or K24 engine provides access to increased horsepower, improved torque, and a wide range of naturally aspirated and forced-induction upgrades.

Unlike conventional steel engine conversion mounts, the B90051 features precision-machined billet aluminum mounting components combined with Innovative Mounts' performance polyurethane bushings. This construction provides improved drivetrain stability, reduced excessive engine movement, and a premium engine bay appearance.

Factory rubber engine mounts are designed primarily for passenger comfort and vibration isolation. Under aggressive driving conditions, excessive drivetrain movement can contribute to wheel hop, drivetrain clunking, and inconsistent shifting feel.

The Innovative Mounts B90051 addresses these concerns with a complete three-mount conversion system featuring driver-side transmission, passenger-side engine, and rear engine mounting components, along with application-specific conversion sub-brackets.

One of the most important fitment requirements is the EG-style front subframe conversion. The B90051 is specifically designed for 1996–2000 Civic chassis using the older 1992–1995 Civic EG front subframe and rear crossmember arrangement.

Vehicles retaining the original 1996–2000 Civic EK-style subframe require the Innovative Mounts B90050 instead.

Available in multiple polyurethane bushing hardness options, billet finishes, and a solid billet configuration, the B90051 is suitable for naturally aspirated K20 builds, high-torque K24 conversions, turbocharged applications, autocross, road racing, and dedicated motorsport projects.

Important: The B90051 is designed for compatible K-Series manual transmissions and an EG-style subframe configuration. The original chassis may have been equipped with either a manual or automatic transmission, but the completed K-Series conversion must use a compatible manual transmission.

Features

• 1996–2000 Honda Civic Compatibility: Designed for compatible sixth-generation EK, EJ, and EM chassis.

• K-Series Engine Conversion: Supports properly configured Honda K20 and K24 engine swaps.

• EG Subframe Requirement: Engineered for Civic chassis converted to the 1992–1995 Civic EG-style front subframe and rear crossmember.

• Billet Aluminum Construction: Provides durable, lightweight mounting components with a premium machined appearance.

• Complete Three-Mount Conversion System: Includes driver-side transmission, passenger-side engine, and rear engine mounts.

• Application-Specific Sub-Brackets: Includes the conversion brackets required for the specified mounting configuration.

• K-Series Manual Transmission Compatibility: Designed for supported K-Series manual transmissions.

• Manual or Automatic Original Chassis: Compatible with supported Civic chassis originally equipped with either transmission type.

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

• No-Tear Bushing Design: Engineered to resist unwanted mount deflection while providing some vibration isolation.

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

• Stress-Analyzed Components: Developed for demanding performance applications.

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

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

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

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

• Solid Billet Option: Available for dedicated competition applications.

• Multiple Finish Options: Standard, polished, and black anodized.

• Mounting Hardware Included: Supplied with manufacturer-specified conversion hardware.

• Steel Alternative Available: Innovative Mounts 90051.

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

Popular Performance Applications

1996–2000 Honda Civic K20 Engine Swaps

Provides the specialized mounting components needed for compatible K20 engine conversions using an EG-style subframe.

1996–2000 Honda Civic K24 Engine Swaps

Supports properly configured K24 engine conversions using the appropriate engine-side post mount bracket.

K20/K24 Hybrid Builds

Suitable for compatible hybrid K-Series engine combinations using the correct mounting brackets and transmission.

Naturally Aspirated K-Series Performance Builds

Supports K20 and K24 engines equipped with performance intake manifolds, headers, camshafts, and upgraded valvetrain components.

Turbocharged K-Series Applications

Provides increased drivetrain mounting rigidity for properly configured forced-induction builds.

Daily-Driven K-Swapped Civics

The 75A polyurethane option offers improved drivetrain stability while retaining some vibration isolation.

Autocross and Road Racing

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

Drag Racing Applications

Firmer polyurethane or solid mounting options help resist excessive engine movement during aggressive launches.

Show and Performance Engine Bays

Billet aluminum construction and multiple available finishes provide a premium appearance for detailed K-Series conversions.

Additional Information

• Manufacturer: Innovative Mounts
• Part Number: B90051
• Product Type: Billet Aluminum K-Series Engine Conversion Mount Kit
• Vehicle Application: 1996–2000 Honda Civic
• Chassis Compatibility: EK / EJ / EM
• Engine Compatibility: Compatible Honda K20 / K24
• Transmission Compatibility: K-Series Manual
• Original Chassis Transmission: Manual or Automatic
• Required Subframe: 1992–1995 Honda Civic EG-Style Front Subframe and Rear Crossmember
• Mount Construction: Billet Aluminum
• Bushing Material: Performance Polyurethane
• Available Bushing Hardness Options: 75A / 85A / 95A
• Additional Mounting Option: Solid Billet
• Available Finishes: Standard / Polished / Black Anodized
• Mounting Configuration: Three Primary Mounts with Conversion Sub-Brackets
• Driver-Side Transmission Mount: Innovative Mounts B90010
• Driver-Side Sub-Bracket: Innovative Mounts 90011-SB
• Passenger-Side Engine Mount: Innovative Mounts B90120
• Passenger-Side Sub-Bracket: Innovative Mounts 90021-SB
• Rear Engine Mount: Innovative Mounts B90130
• Rear Sub-Bracket: Innovative Mounts 90031-SB
• Optional K24 Post Mount Bracket: Innovative Mounts 103750
• Installation Type: K-Series Engine Swap Conversion
• Engineering: CAD/CAM Designed and Stress Analyzed
• Manufacturer-Listed Kit Weight: Approximately 25 lbs
• Steel Alternative: Innovative Mounts 90051
• EK-Subframe Alternative: Innovative Mounts B90050
• Warranty: Manufacturer Lifetime Warranty, Subject to Terms

Available Polyurethane Bushing Hardness Options

75A – Black – Street / Performance

The softest polyurethane option currently listed for the B90051.

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 – Race

Provides increased drivetrain rigidity for higher-output engines and aggressive performance applications.

Manufacturer horsepower guidance: approximately 400–500 HP.

95A – Red – Extreme Race

The stiffest polyurethane option, intended for high-output and dedicated competition applications.

Manufacturer horsepower guidance: 500+ HP.

Solid Billet – Competition Only

A rigid mounting configuration without polyurethane bushings, intended for specialized racing applications where vibration isolation is not a priority.

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

Important: Firmer bushings generally transmit more noise, vibration, and harshness into the passenger cabin. Solid mounts provide essentially no conventional polyurethane vibration isolation.

Available Finish Options

Standard Finish

Provides the natural appearance of machined billet aluminum.

Polished Finish

Offers a brighter, reflective appearance for detailed engine bays and show-oriented builds.

Black Anodized Finish

Provides a darker appearance for enthusiasts seeking a more understated engine bay aesthetic.

Finish availability may vary by selected bushing configuration.

Required EG Subframe Conversion

The Innovative Mounts B90051 is specifically engineered for 1996–2000 Honda Civic applications using a 1992–1995 Civic EG-style front subframe.

This conversion generally involves:

• EG-style front subframe

• Compatible rear crossmember

• Appropriate steering rack

• Compatible lower control arms

• Required suspension and steering hardware

The EG-style subframe configuration changes the drivetrain mounting geometry and provides the mounting locations required for the B90051.

Important: The EG subframe and associated steering and suspension conversion components are not included with the B90051 mount kit.

K24 Engine Post Mount Requirements

K24 engine conversions may require a different engine-side mounting bracket than K20 applications.

Innovative Mounts Part Number: 103750

Product Type: K24 Engine Post Mount Bracket

This bracket is used in compatible K24 engine conversions to provide the correct mounting interface for the swap.

Important: The Innovative Mounts 103750 bracket is sold separately unless specifically included in a package.

Innovative Mounts B90051 vs. B90050

Innovative Mounts B90051 – EG Subframe

• Designed for 1996–2000 Honda Civic EK/EJ/EM

• Requires EG-style front subframe and rear crossmember

• Supports compatible K20 and K24 conversions

• Billet aluminum construction

• Includes application-specific conversion sub-brackets

Innovative Mounts B90050 – EK Subframe

• Designed for 1996–2000 Honda Civic EK/EJ/EM

• Uses the original EK-style front subframe configuration

• Supports compatible K20 and K24 conversions

• Billet aluminum construction

• Uses a different conversion bracket arrangement

Important: The B90050 and B90051 are designed for different subframe configurations and are not interchangeable.

Innovative Mounts B90051 vs. 90051

Innovative Mounts B90051 – Billet Aluminum

• Billet aluminum primary mounting components

• Performance polyurethane bushings

• Available solid billet configuration

• Multiple available finishes

• Premium machined appearance

• EG-subframe K-Series conversion application

Innovative Mounts 90051 – Steel

• Steel primary mounting components

• Performance polyurethane bushings

• Conventional performance mount appearance

• EG-subframe K-Series conversion application

Both kits serve the same general chassis and drivetrain conversion but use different primary mount construction.

Additional Components Required for a K-Series Swap

The Innovative Mounts B90051 addresses the engine and transmission mounting portion of the conversion. Depending on the selected drivetrain, additional components may include:

• Compatible Honda K20 or K24 engine

• Compatible K-Series manual transmission

• EG-style front subframe and rear crossmember

• Compatible steering rack and lower control arms

• Required engine-side mounting bracket

• Innovative Mounts 103750 K24 post mount bracket, if applicable

• Swap-compatible axles

• Compatible intermediate shaft

• K-Series shifter assembly and shift cables

• Hydraulic clutch conversion components

• K-Series engine wiring harness

• Chassis conversion wiring harness

• Compatible ECU or aftermarket engine management system

• Engine swap-compatible radiator

• Cooling hoses and coolant routing components

• Compatible fuel delivery components

• K-Series swap-compatible exhaust header

• Exhaust system modifications

• Intake system and throttle body components

• Accessory and belt routing components

• Additional clearance or chassis modifications required by the selected drivetrain

Exact requirements depend on the engine, transmission, chassis, and intended application.

Common Reasons for Replacement or Upgrade

• K-Series Engine Conversion: Provides specialized mounting components for installing a K20 or K24 drivetrain.

• EG Subframe K-Swap Configuration: Supports Civic chassis converted to an EG-style front subframe.

• Higher Performance Potential: Enables compatible K-Series engine installations in the sixth-generation Civic.

• Excessive Drivetrain Movement: Polyurethane bushings help control unwanted engine movement.

• Improved Drivetrain Positioning: Helps maintain consistent engine and transmission alignment under load.

• Potential Wheel Hop Reduction: Reduced mount deflection may help minimize wheel hop.

• Billet Aluminum Construction: Offers a premium alternative to conventional steel conversion mounts.

• Engine Bay Appearance: Multiple finish options provide a distinctive visual upgrade.

• Naturally Aspirated Performance Builds: Suitable for properly configured high-output K20 and K24 engines.

• Turbocharged Applications: Provides firmer mounting for forced-induction K-Series builds.

• Track and Racing Applications: Helps maintain more consistent drivetrain positioning during aggressive driving.

• Complete Conversion Mounting System: Includes three primary mounts and application-specific sub-brackets.

Installation Notes

1. Verify Vehicle Compatibility: Confirm that the vehicle is a supported 1996–2000 Honda Civic EK, EJ, or EM chassis.

2. Confirm Subframe Configuration: Verify that the vehicle has been converted to the required EG-style front subframe and rear crossmember.

3. Inspect Steering and Suspension Components: Confirm that the steering rack, lower control arms, and associated hardware are compatible with the subframe conversion.

4. Confirm Engine Compatibility: Verify that the selected K20 or K24 engine uses the appropriate engine-side mounting arrangement.

5. Check K24 Bracket Requirements: Obtain the Innovative Mounts 103750 engine post mount bracket if required for the selected K24 configuration.

6. Confirm Transmission Compatibility: Verify that the selected K-Series manual transmission has the correct mounting provisions.

7. Prepare the Vehicle: Park on a level surface and safely support the chassis using appropriate lifting equipment.

8. Remove the Original Drivetrain: Follow the appropriate Honda service procedures for removing the factory engine and transmission.

9. Inspect Mounting Locations: Check the chassis and subframe mounting points for corrosion, cracks, previous repairs, or damage.

10. Install the Driver-Side Transmission Mount: Position the Innovative Mounts B90010 with the 90011-SB sub-bracket according to the manufacturer's instructions.

11. Install the Passenger-Side Engine Mount: Position the Innovative Mounts B90120 with the 90021-SB sub-bracket.

12. Install the Rear Engine Mount: Position the Innovative Mounts B90130 with the 90031-SB sub-bracket.

13. Position the K-Series Drivetrain: Carefully lower the assembled engine and transmission into the engine bay and align the mounting components.

14. Verify Drivetrain Alignment: Ensure the engine and transmission are correctly positioned without excessive mount preload or binding.

15. Inspect Axle Geometry: Confirm proper axle alignment and clearance throughout the required suspension movement.

16. Check Engine Bay Clearance: Inspect the hood, radiator, exhaust, intake, steering components, accessories, and surrounding chassis structures.

17. Install the Supplied Hardware: Use the mounting hardware specified in the manufacturer's installation instructions.

18. Torque Mounting Fasteners: Follow Innovative Mounts' instructions and applicable Honda service procedures.

19. Complete Supporting Systems: Install the clutch hydraulics, shift cables, axles, wiring, cooling system, and fuel system.

20. Inspect for Interference: Confirm that the engine and transmission do not contact surrounding components during normal drivetrain movement.

21. Perform a Final Inspection: Verify mounting alignment, hardware security, drivetrain clearance, and supporting components before operating the vehicle.

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

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

Professional installation by an experienced Honda K-Series engine swap specialist is recommended.

What's Included

The Innovative Mounts B90051 Billet Aluminum K-Series Engine Conversion Mount Kit includes:

• 1 × Innovative Mounts B90010 Driver-Side Transmission Mount

• 1 × Innovative Mounts 90011-SB Driver-Side Sub-Bracket

• 1 × Innovative Mounts B90120 Passenger-Side Engine Mount

• 1 × Innovative Mounts 90021-SB Passenger-Side Sub-Bracket

• 1 × Innovative Mounts B90130 Rear Engine Mount

• 1 × Innovative Mounts 90031-SB Rear Sub-Bracket

• Polyurethane bushings in the selected hardness configuration, or solid mounting components when the solid option is selected

• Manufacturer-supplied installation hardware

Additional Information

This listing is for the complete B90051 conversion mount kit, not the separately available mounts-only version.

The following components are not included unless separately specified:

• Honda K20 or K24 engine

• K-Series manual transmission

• EG-style front subframe and rear crossmember

• Steering rack and lower control arms

• Innovative Mounts 103750 K24 engine post mount bracket

• Clutch and flywheel components

• Axles and intermediate shaft

• Shifter assembly and shift cables

• Engine wiring harness and ECU

• Cooling and fuel system conversion components

• Exhaust components

• Additional K-Series swap components

Verify the exact supplied hardware and component configuration against the manufacturer packaging and installation instructions.

Transform your sixth-generation Honda Civic with the Innovative Mounts B90051 Billet Aluminum K-Series Engine Conversion Mount Kit, engineered specifically for 1996–2000 Honda Civic EK/EJ/EM chassis using compatible K20 or K24 engines, K-Series manual transmissions, and an EG-style front subframe.

Featuring billet aluminum construction, three primary drivetrain mounts, application-specific conversion sub-brackets, performance polyurethane bushing options, and multiple available finishes, the B90051 provides a durable and performance-oriented foundation for a properly configured K-Series swap.

Whether you're building a naturally aspirated K20-powered Civic, upgrading to a high-torque K24A2 engine, developing a turbocharged K-Series project, or preparing a dedicated racing application, Innovative Mounts delivers a purpose-built drivetrain mounting solution.