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Sharpen Rear End Feel on Your S2000
Worn factory rubber bushings in the S2000 rear upper control arm let the rear suspension move under load, causing vague steering feel and uneven tire wear. The Whiteline W63444 42mm rear control arm upper inner bushing kit replaces the soft factory rubber with a durable polyurethane formulation, keeping the rear upper arm locked into proper alignment through hard cornering and braking.
Key Features
- High density polyurethane resists compression set better than factory rubber
- Sharpens steering response and rear end predictability during cornering
- Reduces unwanted deflection in the rear upper control arm mounting points
- Direct replacement for the factory 42mm rear upper inner bushing position
- Backed by Whiteline's limited lifetime warranty against defects
- Whiteline part number W63444 engineered specifically for the S2000 rear suspension
Pairing the W63444 kit with the matching lower control arm bushings gives the rear suspension consistent geometry front to back on the S2000.
Fitment
| Year Range | Make | Model |
|---|---|---|
| 2000-2009 | Honda | S2000 |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | W63444 |
| Brand | Whiteline |
| Position | Rear Control Arm Upper, Inner, 42mm |
| Material | Polyurethane |
| Kit Contents | 8 Bushings, 4 Tubes |
| UPC | Not published by manufacturer |
| Warranty | Limited lifetime, defects in materials and workmanship |
What's Included
- 8 polyurethane bushings
- 4 steel tubes
About Whiteline
Whiteline has engineered performance suspension bushings and alignment correction parts in Australia for more than three decades. Their polyurethane compounds are formulated specifically for suspension use, holding their shape and stiffness far longer than rubber while reducing unwanted flex through the chassis.
Related Parts on Our Site
- Whiteline rear control arm lower bushing kits for the S2000
- Whiteline sway bar upgrades for lightweight roadsters
- Performance suspension bushing kits for track focused builds
FAQ
What is the W63444?The Whiteline W63444 is a polyurethane rear control arm upper inner bushing kit for the Honda S2000 that replaces the factory 42mm rubber bushings for sharper, more consistent rear suspension geometry.
Which years of the S2000 does this kit fit?This kit fits the 2000 through 2009 Honda S2000, covering both the AP1 and AP2 chassis generations.
What comes in the kit?The kit includes 8 polyurethane bushings and 4 steel tubes sized for the rear upper control arm inner mounting position on both sides of the car.
Does this kit replace the entire upper control arm?No, this kit replaces only the bushings and tubes inside the factory upper control arm, so the factory arm is reused.
Will this help with uneven tire wear on my S2000?Yes, worn rubber bushings let the rear suspension shift under load, and replacing them with polyurethane restores proper alignment that helps even out tire wear.
Do I need any special tools to install this kit?A press or a combination of sockets and a vise is typically needed to remove the old bushings and install the new polyurethane bushings and tubes.
Will I need an alignment after installing this kit?Yes, a wheel alignment is recommended after installation to confirm the rear suspension geometry is set correctly.
Should I replace both the upper and lower rear bushings at the same time?Replacing both the upper and lower rear control arm bushings together gives the most consistent handling improvement since both positions typically wear at a similar rate.
Install Instructions
- Raise and support the rear of the vehicle, then remove the wheels
- Support the rear upper control arm and remove the mounting bolts
- Press or drive out the factory rubber bushings from the control arm
- Clean the bushing bore and install the new Whiteline bushings and tubes
- Reinstall the control arm and torque all fasteners to factory specification
- Reinstall the wheels, lower the vehicle, and schedule a wheel alignment
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