Cobb Rear Motor Mount 2017-2021 Honda Civic Type R FK8

The Cobb Rear Motor Mount for the 2017-2021 Honda Civic Type R is a direct-fit replacement for the factory rear engine mount, using a stiffer durometer insert to limit engine movement under torque load. On the FK8 Type R’s high-boost K20C1, reducing engine movement under acceleration protects boost and intake plumbing connections and provides more consistent power delivery.

DETAILS

• Platform: 2017-2021 Honda Civic Type R
• Stiffer durometer insert than factory limits engine movement under torque load
• Reduces stress on boost plumbing, charge pipes, and intake connections from engine movement
• Direct-fit replacement at factory rear motor mount location
• Maintains acceptable NVH levels for daily-driven use not fully solid
• All hardware included

Motor Mount Stiffness: Limiting Engine Movement Under Torque Load

The rear motor mount is the rearmost engine mounting point it connects the bottom of the engine block or transmission to the chassis at the rear of the engine bay. Under hard acceleration, the engine torque reaction produces a rotational force on the engine that the motor mounts resist. A soft factory motor mount allows the engine to rotate on the mounts under this torque reaction the movement is small but it affects the positioning of the intake plumbing, charge pipes, and turbocharger relative to their fixed chassis connection points. On turbocharged applications where boost control solenoids, charge pipes, and intake tubes are precisely positioned, engine movement under acceleration can create stress on these connections and affect their alignment.

FK8/FL5 K20C1 Plumbing Protection and NVH Balance

The Cobb rear motor mount uses a stiffer durometer insert than the factory unit it limits engine movement under torque load without completely eliminating compliance. A fully solid mount eliminates all engine movement but transmits every engine vibration directly into the chassis, creating an unacceptable NVH increase for a street car. The Cobb mount’s stiffer insert reduces movement significantly while retaining enough compliance for acceptable NVH levels on a daily-driven car. On the Honda Civic Type R FK8 and FL5 platforms, the rear motor mount is a known weak point under high-boost conditions upgrading to the Cobb mount reduces the engine movement that stresses the K20C1’s boost and intake plumbing under sustained performance use.

What’s in the Box

• Cobb rear motor mount
• All hardware

Why Choose Cobb Tuning

Cobb Tuning has been developing performance software and hardware for turbocharged enthusiast vehicles since 1999. Founded in Austin, Texas, Cobb built its reputation on the Accessport and expanded into a full catalog of hardware engineered to complement it. Every OTS map is developed in-house on real vehicles, and every hardware product is validated as part of a complete system not sourced and sold in isolation. That integrated approach is why Cobb produces consistent, reliable results across the builds we see every day.

The RallySport Take

The Cobb Rear Motor Mount for the 2017-2021 Honda Civic Type R is the correct engine mount upgrade for FK8 Type R owners running Accessport calibrations with elevated boost. The stiffer insert limits the engine rotation that stresses boost and intake plumbing connections a practical reliability upgrade for builds where the K20C1 is working harder than the factory calibration intended.

Fitment