SPL Parts SPL TR 996 Adjustable Caster/Trailing Arm 996/997/986/987

Vehicle Fitment

• Porsche 996 (911, 1999-2004)
• Porsche 997 (911, 2005-2012)
• Porsche 986 (Boxster, 1997-2004)
• Porsche 987 (Boxster/Cayman, 2005-2012)

Fitment Notes

• Product naming references "Front Tension - Caster," but the manufacturer description discusses both front (anti-dive) and rear (anti-squat) applications for this arm design. Confirm with SPL Parts or a chassis-specific fitment guide which axle this exact part number is designed to mount on for each of the four listed Porsche chassis codes before publishing a definitive front-only or rear-only claim.
• Any change in camber will affect caster - plan to adjust and re-measure caster as part of a complete alignment whenever these arms are installed alongside camber adjustment components.

Features

• Wide range of caster adjustment for precise alignment tuning
• Improves turn-in response
• Compensates for left/right caster variance
• Low-friction FK spherical bearings replace the stock rubber bushing for a more responsive, direct steering feel
• Stainless steel spacers at the forward mounting position allow raising or lowering the pivot point
• Enables anti-dive tuning (front installation) or anti-squat tuning (rear installation)

Specifications

• Type: Adjustable caster/tension/trailing arm
• Bearing type: FK spherical bearings
• Adjustment hardware: Stainless steel spacers
• Weight: 4.0 lbs.
• Width: 4.5 in.

Included Components

• 1x SPL TR 996 adjustable caster/tension arm

Product Description

The SPL Parts SPL TR 996 is an adjustable caster/tension arm for the Porsche 996, 997, 986, and 987 platforms, built to replace the factory rubber-bushed arm with a precision, spherical-bearing setup. Caster adjustment matters more than it might seem on a track-oriented build - any camber change shifts caster as well, so an alignment shop working toward a specific handling target needs the ability to dial caster back in independently rather than being locked to the factory's fixed geometry.

The FK spherical bearings are the core upgrade here: they eliminate the give and vagueness of a stock rubber bushing, translating into more direct, responsive steering feel - a change that's especially noticeable on a car pushed hard enough to load the front suspension through corner entry. Beyond simple caster adjustment, the stainless steel spacers at the arm's forward mounting point let a tuner raise or lower that pivot point specifically to adjust anti-dive characteristics up front, or anti-squat if the same arm design is used at the rear.

Given that the product description covers both front and rear use cases within the same copy, confirm with SPL Parts exactly which axle this specific arm is intended for on each of the four supported chassis codes before finalizing a position-specific product listing - Porsche's 996/997/986/987 platforms share significant suspension architecture, but exact arm placement can still vary by generation.