Upgrade drivetrain control in your 9th-generation Civic Si with the Hasport FG4STK Performance Engine Mount Kit. Designed as a direct replacement for the factory left, right, and rear engine mounts on the 2012–2015 Honda Civic Si, this complete mount system reduces excessive engine movement and helps put power to the ground more effectively.

The FG4STK mounts are CNC-machined from 6061-T6 billet aluminum and engineered using CAD/CAM technology for strength and precise fitment. By limiting drivetrain movement, these mounts can help reduce wheel hop, improve response during acceleration and shifting, and provide additional consistency in performance driving. Reduced engine movement can also help maintain clearance around aftermarket components such as headers, turbo kits, and supercharger systems, particularly with the Civic Si's K24 engine.

Hasport offers several bushing stiffness options, allowing the FG4STK to be configured for everything from a street-driven Civic Si to a dedicated race car.

Features

• Genuine Hasport Performance Engine Mount Kit
• Part Number: FG4STK
• Designed for 2012–2015 Honda Civic Si
• Fits coupe and sedan models
• Direct replacement for the factory drivetrain mounts
• Replaces the left-hand, right-hand, and rear mounts
• CNC-machined 6061-T6 billet aluminum construction
• Engineered using advanced CAD/CAM technology
• Performance polyurethane bushings
• Significantly reduces excessive engine and transmission movement
• Helps reduce wheel hop during hard acceleration
• Helps improve traction and power transfer
• Provides a firmer, more responsive drivetrain feel
• Can improve shifting consistency by limiting drivetrain movement
• Helps maintain clearance around aftermarket headers, turbochargers, and supercharger systems
• Multiple bushing stiffness options available
• Suitable for street, drag, autocross, and road-course applications
• Covered by Hasport's lifetime warranty against defects in materials or workmanship

Vehicle Fitment

• 2012-2015 Honda Civic Si – Coupe & Sedan

Bushing Options

• U62A – Street: Most street-friendly polyurethane option
• U70A – Race: Firmer option for aggressive street and performance use
• U88A – Extreme Race: Very stiff configuration intended primarily for competition
• U94A – Most Extreme Race: Maximum polyurethane stiffness for dedicated race applications

Higher-durometer bushings provide greater control of drivetrain movement but will also increase noise, vibration, and harshness (NVH) inside the vehicle.

Kit Includes

• 1 × Left-Hand Mount
• 1 × Right-Hand Mount
• 1 × Rear Torque Mount
• 1 × Left-Hand Bracket
• 1 × Right-Hand Bracket & Brace
• 1 × Rear Bracket
• Installation hardware

Specifications

• Manufacturer: Hasport Performance
• Part Number: FG4STK
• Product Type: Complete Performance Engine Mount Kit
• Application: 2012–2015 Honda Civic Si
• Engine: K24-Series factory Civic Si application
• Construction: CNC-Machined 6061-T6 Billet Aluminum
• Available Durometers: 62A, 70A, 88A, 94A

Important Fitment Note:

• FG4STK is a complete replacement mount system for the 2012–2015 Civic Si. It replaces the factory left, right, and rear mounts and should not be combined with Hasport's FGUPR upper torque mount, which is designed to work with the factory Honda right-hand mount.