SuperPro SPF3501K Rear Trailing Arm Upper Rear Bushing Kit for Lexus IS250 IS350

Vehicle Fitment

• 2006-2013 Lexus IS250 (GSE20 Platform, RWD, 2.5L V6)
• 2010-2013 Lexus IS250 C Convertible (GSE20 Platform, RWD, 2.5L V6)
• 2006-2013 Lexus IS350 (GSE21 Platform, RWD, 3.5L V6)
• 2010-2013 Lexus IS350 C Convertible (GSE21 Platform, RWD, 3.5L V6)
• 2008-2014 Lexus IS F (USE20 Platform, RWD, 5.0L V8)

Fitment Notes

• Fits the rear (knuckle-side) position of the rear upper trailing arm only
• For the front (frame-side) position of the upper trailing arm, see SPF3504K
• RWD variants only; AWD IS250/IS350 models use a different rear suspension geometry
• Bushing is a press-fit clamshell design - a bearing C-clamp tool is strongly recommended for removal and installation
• Rear wheel alignment required after installation

Features

• Replaces the staked rubber bushings at the knuckle-side mount of the rear upper trailing linkage with durable polyurethane
• Reduces trailing arm deflection under hard cornering and braking, improving rear wheel alignment stability
• Made from SuperPro's engineering-grade polyurethane - significantly more durable than OEM rubber
• Maintains correct rear toe and camber angles under load, reducing uneven tire wear
• Resistant to oils, coolants, heat, and road chemicals - will not degrade like rubber over time
• Backed by SuperPro's Lifetime Warranty with no exclusions for track or motorsport use
• Designed and manufactured in Australia with 40+ years of suspension expertise

Specifications

• Position: Rear Trailing Arm - Upper Rear (Knuckle-Side Mount)
• Material: Engineering-grade polyurethane
• Installation Style: Press-fit clamshell - bearing C-clamp tool recommended
• Drivetrain: RWD only, as listed
• UPC: 9317745035015
• Warranty: Lifetime

Included Components

• 4x Polyurethane Bushings (2 sets - left and right)

Product Description

The SuperPro SPF3501K is a rear trailing arm upper rear bushing kit designed for the rear knuckle-side mount of the upper trailing arm on the Lexus IS250, IS350, and IS F. This is one of several bushing positions in the rear multi-link suspension of these platforms, and it plays a key role in holding the upper trailing arm securely to the knuckle. When the staked OEM rubber bushings wear out, the trailing arm can shift position under load, causing rear wheel alignment to change dynamically during cornering and braking - leading to instability, increased tire wear, and imprecise handling.

SuperPro's polyurethane replacement eliminates this deflection while retaining acceptable NVH levels for street use. The clamshell press-fit design replaces the factory staked rubber units; a bearing C-clamp tool is strongly recommended for clean removal and proper installation. A rear wheel alignment is required after fitting. The kit covers both left and right sides and is backed by SuperPro's Lifetime Warranty covering all applications including track and motorsport use.