PRL SRS Collar Kit Front and Rear Installation Guide

By PRL Motorsports - Premium Automotive Performance Products | Published: 2026-10-25

Category: How-to Guides

Step-by-step instructions to install the PRL SRS Collar Kit on your 2022+ Honda Civic or 2023+ Civic Type R, tightening subframe slop for sharper handling.

Quick answer

Install the PRL SRS Collar Kit front and rear to eliminate factory subframe slop in your 2022+ Honda Civic or 2023+ Civic Type R. The collars fill oversized mounting holes, reducing vibration and improving steering response.

Why the factory subframe has slop

Honda engineers intentionally drill subframe mounting holes 2mm larger than the bolts to simplify assembly and reduce production costs. While this doesn't affect normal driving, it allows the subframe to shift under heavy cornering or braking, causing rattles and vague steering feel. The PRL SRS Collar Kit solves this by centering and locking the subframe in place without adding stiffness that compromises comfort.

What the kit includes and what you'll need

The PRL SRS Collar Kit comes with precision-machined collars for both front and rear subframe positions. You'll need a jack and jack stands (or a lift), a 17mm socket and ratchet, a torque wrench capable of 60-80 ft-lbs, and a pry bar or similar tool to align the subframe holes. The installation is straightforward and can be completed in about an hour.

Installation steps

1. Raise and support the vehicle: Jack up the front and rear of the car and place it securely on jack stands. Make sure the subframe is fully unloaded—do not leave the suspension hanging. Common mistake: Not supporting the subframe evenly can make alignment difficult. Use stands under the factory jack points.
2. Remove the factory subframe bolts: Using a 17mm socket, remove the four bolts that secure the front subframe (two per side) and the four bolts for the rear subframe. Keep the bolts in a safe place—you'll reuse them. Checkpoint: If a bolt is stubborn, apply penetrating oil and let it sit for five minutes before trying again.
3. Insert the PRL collars: Slide one collar into each empty subframe mounting hole. The collars are tapered—insert the smaller end first. Use a pry bar to gently align the subframe holes if they don't line up perfectly. Common mistake: Forcing the collar in the wrong orientation can damage it. The tapered end always goes toward the subframe.
4. Reinstall and torque the bolts: Hand-thread each factory bolt through the collar and into the subframe. Once all bolts are started, torque them to 65 ft-lbs (front) and 75 ft-lbs (rear) in a crisscross pattern. Checkpoint: Overtorquing can strip the threads. Use a reliable torque wrench and follow the specified values.
5. Lower the vehicle and test: Remove the jack stands and lower the vehicle to the ground. Take a short test drive, paying attention to steering feel and any new rattles. The collars should eliminate subframe noise immediately. Common mistake: Skipping the test drive. Listen for any new sounds that might indicate a collar shifted during installation.

Product facts

PRL SRS Collar Kit Front and Rear - 2022+ Honda Civic, 2023+ Honda Civic Type-R: The subframe mounting holes in the 11th Gen Civic are 2mm larger than the bolts, allowing for shifts, vibrations, and rattles during intense cornering or braking. Filling that gap with the PRL collars eliminates unwanted movement, giving you more precise steering and a quieter cabin under load.
PRL SRS Collar Kit Front and Rear - 2022+ Honda Civic, 2023+ Honda Civic Type-R