Whiteline Rear Adjustable Toe Arm Install Guide: Subaru & Toyota (KTA147B)

Why Your Rear Tires Are Wearing on the Inside Edge

Uneven rear tire wear, a vague or "floaty" feeling through fast sweepers, and an alignment shop telling you rear toe is "out of factory spec, non-adjustable" all point to the same weak link: the factory rear toe arm. On most Subaru and Toyota platforms with independent rear suspension, the factory arm relies on a soft rubber bushing and a narrow-range eccentric bolt that wasn't designed to hold precise alignment once you lower the car, add stiffer springs, or just put miles on stock rubber. That's the exact gap the Whiteline Rear Adjustable Toe Arm (KTA147B) closes.

What Makes the KTA147B Different From the Factory Arm

• In-situ (on-car) adjustable turnbuckle — dial in exact rear toe without pulling the arm back off the car for every correction

• Low-compliance bushings replace the factory rubber, cutting out the deflection that lets toe drift under hard cornering or braking

• 3-coat, 3-step powder coating for corrosion resistance that outlasts a factory arm sitting under the car through winters and road spray

• Direct bolt-on design — same mounting points as the factory arm, no cutting, drilling, or fabrication

It's currently on sale at $349.99, down from $399.99 — see the full spec sheet and fitment on the product page.

Signs You Need This Upgrade

• Inside-edge-only wear on rear tires that keeps coming back after a "normal" alignment

• Alignment techs telling you rear toe is out of spec and there's nothing more they can do with the factory hardware

• Rear end feels vague, darty, or unpredictable transitioning through S-curves

• You've lowered the car on coilovers or lowering springs and haven't corrected the resulting toe curve

• You track the car or autocross and want repeatable, dialed-in rear geometry instead of guessing

Tools You'll Need

• Jack and jack stands rated for the rear of your specific Subaru or Toyota — check your owner's manual for lift points

• Lug wrench or impact gun

• Metric wrench/socket set matching your factory arm's mounting hardware

• Torque wrench

• Penetrating oil — factory bolts on a car with any age on it are often seized

Install Walkthrough

1. Break the rear lug nuts loose while the car is still on the ground, then raise and support the rear on jack stands. Remove the wheel.

2. Locate the factory rear toe arm — it runs roughly fore-aft from the knuckle to a rear subframe mounting point. Soak both mounting bolts with penetrating oil if the car has any age on it.

3. Before removing anything, mark the factory eccentric bolt's current position with a paint pen as a rough baseline.

4. Remove the factory arm's two mounting bolts and pull the arm free.

5. Install the Whiteline KTA147B in the same orientation, hand-tightening both ends first so the arm can move freely while you set a rough length with the turnbuckle.

6. Torque both mounting bolts to your vehicle's factory service manual spec for the rear toe/control arm — Whiteline's bushings are engineered for factory clamping force, so pull the exact number from your factory manual or a trusted repair database for your chassis and model year rather than guessing.

7. Reinstall the wheel, torque the lug nuts to spec, and repeat on the opposite side if you're replacing both arms.

8. Lower the car and bounce the rear suspension a few times to settle the bushings before doing any fine adjustment.

Setting Rear Toe

This is where the KTA147B earns its price over a fixed-length arm. With the turnbuckle design, you can thread the arm longer or shorter in small increments to bring rear toe into spec without removing anything. Get the final numbers dialed in on an alignment rack — a good shop can read toe angle in real time while the turnbuckle is adjusted, which is far more accurate than eyeballing ride height. Most shops set slight rear toe-in for stability; if you're chasing outright rotation for autocross, a touch less toe-in livens up the rear — talk to your alignment tech about what matches your driving.

After the Install

Give the car 50-100 miles and recheck that both turnbuckle jam nuts are still tight — new bushings can seat further than expected on the first few drives, which can shift toe slightly. After that, treat it like any suspension component: a quick visual check at oil changes is enough.

Get the KTA147B While It's on Sale

The Whiteline Rear Adjustable Toe Arm (KTA147B) is $349.99 right now, marked down from $399.99, and ships ready to bolt onto your Subaru or Toyota's rear suspension. Check current fitment and grab yours here before the sale ends.