HRD Precision Machined Transmission Mount for 2012-2015 Honda Civic Si - Midnight Navy

The 9th Gen Honda Civic Si rewards every smart upgrade you make. As you add power, grip, and more serious suspension, the soft OEM transmission mount quickly becomes apparent. The drivetrain moves more than it should, shifts feel a little vague, and putting power down cleanly out of corners becomes harder than it needs to be. If you've already added a rear motor mount and upper passenger side pitch mount, this is your next move.

What you are feeling is excessive drivetrain motion that your OEM mounts are allowing to occur. While your factory mounts are designed to favor complacency over drivetrain connectedness, once you've began modifying your 9th Gen or doing your first track days the trade-offs become more apparent than ever. The HRD Precision Machined 2012-2015 Honda Civic Si Transmission Mount is built to tighten that connection and let the rest of your setup work as intended.

Engineered Without Compromise

This transmission mount is designed to better control how the engine and gearbox move under load, especially during hard shifts, launches, and rapid on/off throttle transitions. By reducing unwanted movement at the transmission side of the drivetrain, gear engagement feels more positive, and your inputs translate more cleanly to forward motion.

The result is a more direct, mechanical feel from the driver’s seat. Shifts slot in with greater confidence, mid-corner corrections feel more precise, and the chassis as a whole responds with a sharper, more unified character. We precision machine this mount out of billet 7075 for its superior strength characteristics, taking the at any cost approach that HRD is known for.

Easy-to-Install, Battery Tray Relocation Friendly

Instead of replacing the entire lower bracket assembly, this mount is designed to work with the factory Honda lower bracket. That decision is intentional. The OEM bracket keeps factory geometry and alignment, which means you get OE-level fitment without fighting the car during installation.

Retaining the OEM lower bracket also pays off for enthusiasts already running, or planning to run, a battery relocation tray. Using the OEM lower bracket maintains compatibility with popular aftermarket battery tray relocation kits, avoiding the interference issues that a full replacement solution creates.

The end result is simple. A cleaner, easier install that fits the way it should the first time, with all of the benefits you've come to expect from a component engineered for performance without compromise.

Interchangeable Bushings

True to HRD’s dual-duty philosophy, each transmission mount ships ready to run with our 65a polyurethane bushings pre-installed. This durometer is an ideal choice for most street and spirited driving builds, offering a dramatic reduction in drivetrain movement over stock while keeping NVH at a very reasonable level.

For drivers who want to push the chassis even harder, every mount also includes a full set of our 80a bushings in the box. Swapping to the stiffer bushings increases drivetrain rigidity further, sharpening shift feel with an even greater reduction in wheel hop for dual-duty or track-focused cars.

Whether you prioritize a blend of comfort with control, or maximum precision, our mount is ready to match your build’s intent.

Transforms How Your 9th Gen Si Feels

When paired with our rear engine mount and passenger side pitch mount, this transmission mount becomes a key part of a properly locked-down drivetrain package. With all ends of the drivetrain better controlled, wheel hop is reduced, shifts feel more consistent, and the car is easier to drive right at the limit.

On the street, you will notice cleaner on/off throttle transitions and a more cohesive, connected feel from the front end. On track or during hard driving, the feedback becomes more predictable, letting you focus on your line instead of managing slop in the drivetrain. The end result is a refined, true dual-duty and motorsports ready drivetrain package.

Key Features

• Precision machined from 7075 for superior strength
• Utilizes the OEM lower bracket for OE-alignment and fitment
• Compatible with popular battery tray relocation kits
• Ships with 65a bushings pre-installed, 80a bushings included for motorsports use
• Significantly reduces drivetrain movement under load, reducing wheel hop
• Improves shift feel, power delivery, and overall chassis feedback
• Designed to complement HRD rear motor mount and passenger pitch mount
• Finished in our iconic Midnight Navy anodize
• Backed by HRD’s limited lifetime manufacturer’s warranty

If you're looking to complete your HRD motor mount setup and lock down your drivetrain to perfection, look no further. With two bushing options included, compatibility with popular battery relocation trays, and OE-level fitment, this is the ultimate transmission mount for your 9th Gen Si.

And once you feel the difference - there’s no going back.

Product Fitment

• 2012–2015 Honda Civic Si