Home » SPL Parts Rear Knuckle Bushing GR86/BRZ/GT86/WRX
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SPL Parts Rear Knuckle Bushing GR86/BRZ/GT86/WRX

Special Order
SKU: SPL RKB FRS
DISCLAIMER: Special Orders May take 2-3 weeks or longer for delivery depending on the manufacturer.  Not refundable or returnable.
$134.10
-10% $149.00 $134.10

The SPL rear knuckle bushings replace the rubber factory knuckle bushing with a low friction PTFE-lined spherical bearing. Replacing the OEM rubber bushing eliminates deflection under heavy acceleration and braking loads that leads to unwanted geometry changes, and prevents binding by allowing the knuckle to smoothly articulate. The reduced deflection also translates to improved driver feedback from the tire and better overall response. We use the largest possible FK bearing, to increase longevity and reduce NVH, mounted in a 6061-T6 aluminum housing precision cut with +/- .001" tolerance to insure proper fitment.

Benefits
Lightweight: 0.674 lbs (306g) / 0.337 lbs (153g) per Side
Improves Throttle and Braking Response
Reduced Wheel Hop
Maintenance-Free, US Made, PTFE-Lined FK Bearings
Materials
6061-T6 Aluminum Bearing Shells
Steel PTFE-lined FK Spherical Bearings
Noise, Vibration, and Harshness (NVH)
Product NVH Rating

The SPL rear knuckle bushings are a moderate contributor to NVH. The rear traction arm knuckle bushings are an active part of reducing the felt vibration from potholes, rough pavement, and other road irregularities. By replacing one of the OEM rubber bushings with a spherical the longitudinal compliance of the suspension is reduced.

If combining the rear knuckle bushings with a spherical traction arm as well, then the rear knuckle bushings will add a similar amount of NVH as the traction arm. When combined with the solid subframe bushings it eliminates all longitudinal bushing deflection and will result in a noticeable amount of NVH over rough roads. Running larger tires with taller sidewalls at lower pressures and high-quality shocks will improve the NVH.

 

Sold as a pair. One pair per vehicle.

 

Confirmed Applications

2021+ Toyota GR86 (ZN8)

2013 - 2021 Toyota 86 / Scion FR-S (ZN6)

2013+ Subaru BRZ (ZC6/ZD8)

2015 - 2021 Subaru WRX / WRX STI (Inc. Type-RA))

2022+ Subaru WRX (VB)

 

Replaces OEM Part Numbers

This is a list of known OEM part numbers. OEMs constantly make changes to part numbers due to part updates, suppliers, etc so this may not be a complete list.

Toyota
SU003-00366

Subaru
20254-CA000