Whiteline Rear Positive Traction Kit Inserts – 2013-2021 Scion FR-S / Subaru BRZ / Toyota 86

Whiteline Rear Positive Traction Kit Inserts – 2013-2021 Scion FR-S / Subaru BRZ / Toyota 86

Firm Up the Rear Drivetrain on the ZN6/ZC6
The Whiteline KDT922 Rear Positive Traction Kit uses polyurethane inserts to reduce movement in the rear drivetrain mounting on the 2013-2021 FR-S, BRZ, and Toyota 86. By reducing drivetrain compliance, the inserts improve the ZN6/ZC6’s throttle response precision and rear axle consistency — qualities that are central to the driving experience these cars were designed around.

DETAILS

• Polyurethane inserts for rear drivetrain mounting on ZN6/ZC6
• Reduces drivetrain movement under acceleration and cornering
• Improves throttle response precision and rear axle consistency
• Insert design — no removal of OEM housing required
• Fitment: 2013-2021 Scion FR-S, Subaru BRZ, Toyota 86

ZN6/ZC6 Rear Drivetrain Movement
The FA20-powered ZN6/ZC6 uses a rear-mounted differential. Movement in the differential mounting under hard acceleration and cornering changes driveshaft angles momentarily, producing imprecise throttle response and subtle rear axle inconsistency. Whiteline’s inserts reduce this movement.

Insert Approach
The KDT922 fills the void in existing mount housings with polyurethane inserts. No housing removal required — a straightforward installation that achieves meaningful compliance reduction.

Part of the ZN6/ZC6 Drivetrain Package
The rear positive traction inserts work alongside the in-cradle differential mount bushings (KDT924) and gearbox shift kit (KDT926) for comprehensive ZN6/ZC6 drivetrain precision improvement.

Why Choose Whiteline

Whiteline has been engineering suspension components from their facility in Australia since 1979. Every product in their catalog is developed with a clear goal: measurable improvement in handling, stability, and tyre contact. Whiteline’s polyurethane bushings, sway bars, control arms, and alignment correction kits are engineered using finite element analysis and validated on track before they reach the market. Their components are direct-fit, bolt-on solutions designed for enthusiasts who want real performance gains without fabrication or custom work.

The RallySport Take

Drivetrain precision improvement for the ZN6/ZC6 — one of the best feel-per-dollar upgrades for this platform. The install is straightforward but doing it correctly matters — clean the housing thoroughly before installation and apply grease to all polyurethane-to-metal contact surfaces. The improvement in drivetrain feel shows up immediately on the first hard acceleration run after installation.

What’s in the Box

• Polyurethane inserts for rear drivetrain mounting on ZN6/ZC6
• Reduces drivetrain movement under acceleration and cornering
• Improves throttle response precision and rear axle consistency
• Insert design — no removal of OEM housing required

Fitment