Upgrade your fourth-generation Honda Civic or second-generation Honda CRX with the Innovative Mounts B19151 Billet Aluminum Engine & Transmission Mount Kit, specifically designed for 1988–1991 Honda Civic and CRX ED/EE/EF chassis equipped with compatible D-Series engines and cable-operated manual transmissions.

Engineered as a performance-oriented replacement for the factory engine mounting system, the Innovative Mounts B19151 combines precision-machined billet aluminum construction with performance polyurethane bushings to provide improved drivetrain stability, reduced excessive engine movement, and a premium engine bay appearance.

Factory Honda rubber engine mounts are designed to prioritize passenger comfort and vibration isolation. Over time, these mounts can deteriorate, crack, or separate, allowing excessive engine movement during acceleration, deceleration, and shifting. This movement can contribute to drivetrain clunking, inconsistent shifting feel, and wheel hop during aggressive acceleration.

The Innovative Mounts B19151 addresses these concerns with a complete three-mount replacement system featuring driver-side engine, passenger-side transmission, and rear engine mounting components.

Unlike an engine conversion mount kit, the B19151 is designed to retain the factory-style D-Series engine and cable transmission configuration while upgrading the primary drivetrain mounting points.

The billet aluminum construction offers a premium alternative to conventional steel engine mounts, while Innovative Mounts' polyurethane bushings help maintain more consistent engine and transmission positioning under load.

Designed as a direct bolt-on replacement for supported applications, the B19151 does not require welding, chassis modification, or hood trimming. The mounting geometry is engineered to maintain proper drivetrain positioning without introducing axle bind.

Available in multiple polyurethane bushing hardness options, billet finishes, and a solid billet configuration, the Innovative Mounts B19151 is suitable for daily-driven performance vehicles, naturally aspirated D-Series builds, turbocharged applications, autocross, road racing, and dedicated motorsport projects.

Important: The Innovative Mounts B19151 is a D-Series replacement engine mount kit for cable-operated transmissions. It is not a B-Series engine conversion kit. For compatible B-Series cable transmission swaps, see Innovative Mounts B19150.

Features

• 1988–1991 Honda Civic Compatibility: Designed for supported fourth-generation Civic ED/EE/EF applications.

• 1988–1991 Honda CRX Compatibility: Supports compatible second-generation CRX chassis.

• D-Series Engine Applications: Designed for supported factory-style Honda D-Series engines.

• Cable Transmission Compatibility: Specifically engineered for D-Series cable-operated manual transmissions.

• Direct Replacement Design: Replaces the three primary factory engine and transmission mounting positions.

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

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

• Bolt-On Installation: Designed for installation without welding or chassis fabrication in supported applications.

• No Hood Modification Required: Engine positioning is designed to maintain factory hood clearance.

• Factory-Style Drivetrain Positioning: Engineered to maintain appropriate engine and transmission alignment without axle bind.

• Performance Polyurethane Bushings: Help reduce excessive drivetrain movement compared with conventional 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 60A, 75A, 85A, and 95A polyurethane configurations.

• Solid Billet Option: Available for dedicated competition applications.

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

• Mounting Hardware Included: Supplied with the manufacturer's installation hardware.

• Steel Alternative Available: Innovative Mounts 19151.

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

Popular Performance Applications

1988–1991 Honda Civic Engine Mount Replacement

Replaces aging factory rubber mounts with billet aluminum performance components while retaining the supported D-Series drivetrain.

1988–1991 Honda CRX Engine Mount Upgrades

Provides improved drivetrain mounting rigidity for compatible CRX applications.

D16A6 Performance Builds

Suitable for naturally aspirated D16A6 engines equipped with upgraded intake, exhaust, and camshaft components.

Naturally Aspirated D-Series Applications

Helps maintain consistent drivetrain positioning in modified street and track vehicles.

Turbocharged D-Series Builds

Provides increased drivetrain stability for properly configured forced-induction D-Series applications.

Daily-Driven Performance Vehicles

The 60A and 75A polyurethane options offer improved drivetrain control 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.

Engine Bay Appearance Upgrades

Billet aluminum construction and multiple finish options provide a premium alternative to conventional factory engine mounts.

Additional Information

• Manufacturer: Innovative Mounts
• Part Number: B19151
• Product Type: Billet Aluminum D-Series Engine & Transmission Replacement Mount Kit
• Vehicle Application: 1988–1991 Honda Civic / CRX
• Chassis Compatibility: ED / EE / EF, Subject to Application
• Engine Compatibility: Compatible Honda D-Series
• Transmission Compatibility: D-Series Cable-Operated Manual
• Mount Construction: Billet Aluminum
• Bushing Material: Performance Polyurethane
• Available Bushing Hardness Options: 60A / 75A / 85A / 95A
• Additional Mounting Option: Solid Billet
• Available Finishes: Standard / Polished / Black Anodized
• Mounting Configuration: Three Primary Mounts
• Driver-Side Engine Mount: Innovative Mounts B19111
• Passenger-Side Transmission Mount: Innovative Mounts B19121
• Rear Engine Mount: Innovative Mounts B19131
• Installation Type: Direct Bolt-On Replacement
• Hood Modification: Not Required for Supported Applications
• Mounting Hardware: Included
• Engineering: CAD/CAM Designed and Stress Analyzed
• Manufacturer-Listed Kit Weight: Approximately 8 lbs
• Steel Alternative: Innovative Mounts 19151
• Warranty: Manufacturer Lifetime Warranty, Subject to Terms

Available Polyurethane Bushing Hardness Options

60A – Red – Street

The softest available polyurethane option for the B19151.

Recommended for daily-driven vehicles where improved drivetrain stability is desired while minimizing additional vibration.

Manufacturer horsepower guidance: up to approximately 250 HP.

75A – Black – Performance Street

Provides increased drivetrain rigidity for modified street vehicles and occasional track use.

Manufacturer horsepower guidance: approximately 250–400 HP.

85A – Grey – Race

Designed for higher-output engines and aggressive performance applications requiring increased drivetrain control.

Manufacturer horsepower guidance: approximately 400–500 HP.

95A – Red – Extreme Race

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

Honda OEM Replacement Part Numbers

The Innovative Mounts B19151 replaces the following Honda factory engine mounting components:

Honda 50821-SH3-040

• Factory Driver-Side Engine Mount

• Innovative Mounts Replacement: B19111

Honda 50805-SH3-040

• Factory Passenger-Side Transmission Mount

• Innovative Mounts Replacement: B19121

Honda 50810-SH3-040

• Factory Rear Engine Mount

• Innovative Mounts Replacement: B19131

Important: These OEM cross-references apply to the manufacturer's specified mounting configuration. Verify vehicle-specific compatibility before ordering.

Innovative Mounts B19151 vs. 19151

Innovative Mounts B19151 – Billet Aluminum

• Billet aluminum construction

• Multiple available finishes

• Polyurethane and solid mounting options

• Premium machined appearance

• Manufacturer-supplied installation hardware

• Designed for D-Series cable transmission applications

Innovative Mounts 19151 – Steel

• Steel construction

• Performance polyurethane bushings

• Uses specified factory/OEM hardware

• Designed for compatible D-Series cable transmission applications

Both kits serve the same general vehicle and drivetrain application but use different mount construction.

Innovative Mounts B19150 vs. B19151

Innovative Mounts B19150 – B-Series Conversion

Designed for installing a compatible B-Series engine and cable-operated manual transmission into a supported 1988–1991 Honda Civic or CRX.

Innovative Mounts B19151 – D-Series Replacement

Designed to replace the factory engine and transmission mounts on supported D-Series-powered 1988–1991 Honda Civic and CRX applications.

Important: These kits are intended for different engine configurations and should not be treated as interchangeable.

Common Reasons for Replacement or Upgrade

• Worn Factory Rubber Mounts: Aging mounts can crack, separate, or allow excessive drivetrain movement.

• Deteriorated Engine Mount Bushings: Old rubber can lose its ability to properly control engine movement.

• Excessive Engine Movement: Performance polyurethane helps control unwanted drivetrain rocking.

• Wheel Hop During Acceleration: Reduced engine movement may help minimize wheel hop.

• Drivetrain Clunking: Worn mounts may contribute to noise during acceleration and shifting.

• Inconsistent Shifting Feel: Reduced drivetrain movement can help maintain more consistent transmission positioning.

• Naturally Aspirated Performance Builds: Supports improved drivetrain control for modified D-Series engines.

• Turbocharged Applications: Provides firmer mounting for higher-output D-Series builds.

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

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

• Track and Racing Applications: Firmer mounts help maintain more consistent drivetrain positioning.

• Complete Mounting System Upgrade: Replaces the three primary factory engine and transmission mounting positions.

Installation Notes

1. Verify Vehicle Compatibility: Confirm that the vehicle is a supported 1988–1991 Honda Civic or CRX ED, EE, or EF chassis.

2. Confirm Engine Compatibility: Verify that the engine uses the factory-style D-Series mounting arrangement supported by the B19151.

3. Confirm Transmission Compatibility: Use a compatible D-Series cable-operated manual transmission.

4. Inspect Engine-Side Brackets: Verify that the factory engine and transmission mounting brackets are present and compatible.

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

6. Support the Engine and Transmission: Properly support the drivetrain before removing factory mounting components.

7. Remove the Factory Mounts: Follow the appropriate Honda service procedures for removing the driver-side, passenger-side, and rear mounts.

8. Inspect Mounting Locations: Check the chassis mounting points, engine brackets, and transmission mounting surfaces for damage or corrosion.

9. Install the Driver-Side Engine Mount: Position the Innovative Mounts B19111 according to the manufacturer's instructions.

10. Install the Passenger-Side Transmission Mount: Position the Innovative Mounts B19121 mounting component.

11. Install the Rear Engine Mount: Position the Innovative Mounts B19131 rear mounting component.

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

13. Install the Supplied Hardware: Use the mounting hardware provided with the kit and any additional hardware specified by Innovative Mounts.

14. Torque Mounting Fasteners: Follow the manufacturer's installation instructions and applicable Honda service procedures.

15. Inspect Engine Bay Clearance: Verify adequate clearance around the engine, transmission, exhaust, cooling system, and surrounding components.

16. Check for Additional Vibration: Some increase in noise, vibration, and harshness is normal when using performance polyurethane or solid mounts.

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

18. Recheck After Initial Use: Inspect the mounts and mounting 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 mechanic or performance specialist is recommended.

What's Included

The Innovative Mounts B19151 Billet Aluminum D-Series Engine & Transmission Mount Kit includes:

• 1 × Innovative Mounts B19111 Driver-Side Engine Mount

• 1 × Innovative Mounts B19121 Passenger-Side Transmission Mount

• 1 × Innovative Mounts B19131 Rear Engine Mount

• 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 billet aluminum D-Series replacement mounting system designed for compatible 1988–1991 Honda Civic and CRX chassis using cable-operated manual transmissions.

The following components are not included unless separately specified:

• Engine

• Transmission

• Additional engine conversion components

• Replacement engine-side brackets unless specifically supplied

• Clutch and flywheel components

• Axles and intermediate shaft

• Transmission conversion components

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

Upgrade your fourth-generation Honda Civic or second-generation CRX with the Innovative Mounts B19151 Billet Aluminum D-Series Engine & Transmission Mount Kit, engineered specifically for compatible 1988–1991 Honda Civic and CRX ED/EE/EF chassis equipped with D-Series engines and cable-operated manual transmissions.

Featuring billet aluminum construction, three primary drivetrain mounts, performance polyurethane bushing options, direct bolt-on installation, and multiple available finishes, the B19151 provides improved drivetrain stability while maintaining the factory-style engine and transmission configuration.

Whether you're replacing worn factory mounts, upgrading a naturally aspirated D16-powered Civic, developing a turbocharged CRX, or preparing a dedicated racing application, Innovative Mounts delivers a durable and performance-oriented mounting solution.