The Innovative Mounts Billet Engine Mount Kit (B90850) is a high-performance replacement engine mounting solution designed for the 2006-2011 Honda Civic Si (FA5/FG2) equipped with K-Series engines and manual transmissions. Engineered to improve drivetrain stability, reduce excessive engine movement, and enhance power transfer, this complete four-piece mount kit is an excellent upgrade for street performance, track racing, and high-horsepower applications.

Manufactured using precision-machined billet aluminum components and a durable steel front mount, this kit offers exceptional strength, reliability, and a premium performance-oriented appearance. Innovative Mounts' specialized polyurethane bushings help minimize unwanted drivetrain movement while offering multiple stiffness options to accommodate different driving styles and performance requirements.

Unlike factory rubber and hydraulic engine mounts, which can deteriorate over time and allow excessive engine movement, the Innovative Mounts B90850 kit replaces the factory fluid-dampened mounting design with performance-oriented polyurethane bushings. This provides improved drivetrain control, reduced wheel hop, and more consistent power delivery during aggressive driving.

Features

• Precision-Machined Billet Aluminum Construction: Provides excellent strength, durability, and a lightweight performance-oriented design.

• Complete Four-Piece Engine Mount Kit: Includes the replacement engine mounting components needed for compatible 2006-2011 Honda Civic Si applications.

• Steel Front Engine Mount: Includes a heavy-duty steel front mount for additional drivetrain support.

• Direct OEM Replacement: Designed for bolt-in installation without extensive chassis modifications.

• Improved Drivetrain Stability: Reduces excessive engine and transmission movement during acceleration, deceleration, and aggressive driving.

• Reduced Wheel Hop: Helps minimize unwanted drivetrain movement that can contribute to wheel hop during hard launches.

• Performance Polyurethane Bushings: Innovative Mounts' unique no-tear bushing design offers improved durability and controlled vibration absorption.

• Multiple Bushing Hardness Options: Available in different durometer ratings to accommodate performance street, track, and racing applications.

• Improved Driving Response: Reduced drivetrain movement provides a more direct and responsive driving experience.

• CAD/CAM Engineered: Precision-designed and stress-analyzed for reliable performance.

• Factory Engine Bay Compatibility: No hood notching or trimming required for installation.

• Lifetime Manufacturer Warranty: Backed by Innovative Mounts' limited lifetime warranty.

Popular Performance Applications

• Street Performance Builds: Improves drivetrain stability and responsiveness while maintaining a balance between performance and comfort with the appropriate bushing stiffness.

• Naturally Aspirated K20Z3 Builds: Helps stabilize the drivetrain during high-RPM operation and aggressive acceleration.

• Turbocharged K-Series Applications: Reduces excessive engine movement associated with increased horsepower and torque.

• Supercharged Civic Si Builds: Provides improved drivetrain control for forced-induction applications.

• Drag Racing: Helps minimize wheel hop and excessive drivetrain movement during hard launches.

• Road Racing and Track Days: Improves engine stability during aggressive cornering, braking, and acceleration.

• High-Horsepower K-Series Builds: Offers a stronger mounting solution for modified K-Series engines.

• K20/K24 Performance Builds: Suitable for compatible engine configurations using the required Civic Si mounting brackets and transmission.

Additional Information

• Manufacturer: Innovative Mounts
• Part Number: B90850
• Product Type: Billet Engine Mount Kit
• Material: Billet Aluminum with Steel Front Mount
• Finish: Standard Billet Aluminum (polished and black anodized options available)
• Bushing Material: Performance Polyurethane
• Transmission Compatibility: K-Series Manual Transmission
• Chassis Compatibility: Honda Civic Si FA5 / FG2; select FD2 / FN2 applications
• Engine Compatibility: K-Series
• Mounting Configuration: Four-Piece Replacement Engine Mount Kit
• Installation Type: Direct OEM Replacement
• Mounting Hardware: Included

Available Bushing Options:

• 75A (Black): Performance street applications, approximately 250–400 HP.

• 85A (Gray): Track-oriented applications, approximately 400–500 HP.

• 95A (Red): Racing applications, approximately 500+ HP.

Higher durometer bushings provide increased drivetrain control but may transmit additional noise, vibration, and harshness (NVH) into the vehicle. Horsepower ranges are manufacturer-provided selection guidelines.

Important Compatibility Note: This mount kit is designed for compatible Civic Si K-Series manual transmissions. It does not fit K24 Accord, TSX, or Euro R transmissions.

Common Reasons for Replacement

• Worn Factory Engine Mounts: Deteriorated rubber or leaking hydraulic mounts can allow excessive drivetrain movement.

• Excessive Engine Movement: Factory mounts may struggle to control drivetrain movement during aggressive driving or high-horsepower operation.

• Wheel Hop During Acceleration: Upgraded mounts help reduce drivetrain movement that contributes to wheel hop.

• Drivetrain Clunking: Worn or damaged engine mounts may contribute to clunking noises during acceleration, deceleration, or gear changes.

• Reduced Drivetrain Responsiveness: Excessive movement in factory mounts can make acceleration and shifting feel less precise.

• Forced-Induction Upgrades: Turbocharged and supercharged K-Series builds benefit from improved engine stability.

• Track or Racing Preparation: Performance mounts provide more consistent drivetrain positioning under demanding driving conditions.

• Engine Bay Appearance: Billet aluminum construction provides a clean, performance-oriented appearance compared to factory mounts.

Installation Notes

1. Verify Vehicle Compatibility: Confirm that the vehicle is a supported 2006-2011 Honda Civic Si or compatible FD2/FN2 chassis equipped with a K-Series engine and manual transmission.

2. Confirm Transmission Compatibility: This kit is designed for compatible Civic Si K-Series manual transmissions and does not fit K24 Accord, TSX, or Euro R transmissions.

3. Support the Engine and Transmission: Properly support the drivetrain before removing the factory mounts to prevent unintended movement or damage.

4. Remove Factory Mounts: Carefully remove the original engine and transmission mounting components following the appropriate factory service procedures.

5. Install Replacement Mounts: Position the Innovative Mounts billet and steel mounting components in their designated locations, ensuring proper alignment.

6. Install Supplied Brackets and Hardware: Use the included mounting brackets and hardware as specified by Innovative Mounts.

7. Torque Mounting Hardware: Tighten all mounting hardware according to the applicable manufacturer specifications.

8. Inspect Engine Bay Clearance: Verify proper clearance around the engine, transmission, exhaust components, hoses, and surrounding chassis components.

9. Account for Additional NVH: Performance polyurethane mounts are stiffer than factory rubber and hydraulic mounts and may transmit additional vibration into the cabin, particularly at idle.

10. Professional Installation Recommended: Installation by an experienced automotive technician is recommended to ensure proper fitment and drivetrain alignment.

Important: Innovative Mounts states that mounts showing installation bolt impressions cannot be returned or exchanged. Verify compatibility before bolting the mounts into place.

What's Included

• (4) Engine mount assemblies, including billet aluminum mounts and a steel front mount

• (3) Mounting brackets

• Performance polyurethane bushings installed in the mount assemblies

• Required mounting hardware supplied by Innovative Mounts

Note: This kit includes the front, rear, and passenger-side mounting components as specified by Innovative Mounts. The steel front mount is included. Verify the selected bushing stiffness and finish before ordering.

Upgrade your 2006-2011 Honda Civic Si drivetrain with the Innovative Mounts Billet Engine Mount Kit (B90850) for improved engine stability, reduced wheel hop, and more responsive power delivery. Featuring precision-machined billet aluminum construction, a heavy-duty steel front mount, durable performance polyurethane bushings, and multiple stiffness options, this complete four-piece mounting solution delivers the strength, reliability, and performance needed for everything from spirited street driving to dedicated racing applications.