SPL Parts SPL LCAK 996 Lower Control Arm Kit for Porsche 996/997 Boxster Cayman

Vehicle Fitment

• 1999-2005 Porsche 911 Carrera, Carrera 4, Turbo, GT3 (996) - Front and Rear (2 kits required per vehicle), RWD/AWD
• 2005-2012 Porsche 911 Carrera, Carrera 4, Turbo, GT2, GT3 (997 / 997.2) - Front and Rear (2 kits required per vehicle), RWD/AWD
• 1997-2004 Porsche Boxster / Boxster S (986) - Front Only (1 kit per vehicle), RWD
• 2005-2012 Porsche Boxster / Boxster S (987 / 987.2) - Front Only (1 kit per vehicle), RWD
• 2005-2012 Porsche Cayman / Cayman S (987C) - Front Only (1 kit per vehicle), RWD

Fitment Notes

• On the Porsche 911 (996 and 997), this kit fits both the front and rear axle positions - two kits are required per vehicle for a full front and rear installation.
• On the 986 Boxster and 987 Boxster/Cayman, this kit fits the front axle only. The rear suspension geometry on these mid-engine platforms differs from the 911 rear, and a separate kit is not offered for the 987/986 rear.
• The 996 and 997 are available in RWD (Carrera, GT2, GT3) and AWD (Carrera 4, Turbo) configurations. This kit is compatible with both drivetrains.
• The 986 Boxster, 987 Boxster, and 987C Cayman are RWD only - no AWD variants exist for these platforms.
• Each kit is sold as a pair (left and right) and covers one axle position on one vehicle.
• Proven in competition: featured on Eric Sutton's Solo National Champion 996 Turbo build.

Features

• Five independently adjustable alignment parameters in a single kit: camber, caster, track width, roll center, and anti-dive - providing complete control over front (and rear, on 996/997) suspension geometry for any driving application.
• FK PTFE-lined F1-spec, self-cleaning spherical bearings and rod ends eliminate OEM rubber bushing deflection and bind, delivering immediate and precise suspension response, sharper turn-in feel, and accurate steering feedback under all loads.
• SPL's proprietary Double Adjuster, machined from 4140 CrMo steel and electroless nickel plated for corrosion resistance, uses a rotating clamp design to lock down camber and track width simultaneously - no jam nuts, no slipping, no fumbling with multiple wrenches.
• Gun-drilled 6061-T6 billet aluminum trailing link reduces unsprung weight while providing superior strength in the caster adjustment axis compared to cast or stamped alternatives.
• 304 stainless steel adjustment spacers correct roll center height after lowering, reducing the increased roll moment that develops when the roll center drops disproportionately to the center of gravity.
• Anti-dive geometry adjustment allows fine-tuning of front suspension compression under hard braking - particularly valuable for cars running grippy tires, aero, or soft front spring rates on bumpy circuits.
• Extending front track width reduces load transfer to the outer tire during cornering and promotes more neutral handling behavior - an approach Porsche itself has pursued across successive 911 GT3 generations, widening the 996 GT3 front track by nearly 5" (124mm) through the current generation.
• Ti-6Al-4V (Grade 5) blue anodized titanium socket head screws further reduce weight at the adjustment clamps without compromising clamping force.
• Kit weight: 4.63 lbs (2.10 kg) per side - a meaningful reduction in unsprung mass compared to the OEM aluminum and rubber bushing assembly.
• Designed, engineered, and manufactured entirely in the USA by SPL Parts using CAD and Finite Element Analysis for structural validation.

Specifications

• Adjustment Parameters: Camber, Caster, Track Width, Roll Center, Anti-Dive
• Kit Weight: 4.63 lbs (2.10 kg) per side
• Main Arm and Clevis Material: 6061-T6 billet aluminum, black anodized
• Trailing Link Material: 6061-T6 billet aluminum, hollow gun-drilled, black anodized
• Clamp and Spacer Material: 6061-T6 aluminum, 360° rotating clamp design
• Double Adjuster Material: 4140 CrMo steel, electroless nickel plated
• Ball Joint Studs: 4340 CrMo steel, heat-treated
• Adjustment Spacers: 304 stainless steel
• Hardware: Ti-6Al-4V titanium 1/4"-20 socket head screws (blue anodized); Class 10.9 metric / SAE Grade 8 imperial hardware
• Bearings: FK PTFE-lined spherical, F1 Spec, self-cleaning
• Position: Front and Rear (996/997); Front Only (986/987/987C)
• Quantity: 1 kit (1 pair) covers one axle position on one vehicle
• Country of Manufacture: USA
• Part Number: SPL LCAK 996
• Includes: SPL LCA 996 (Adjustable Lower Control Arms, 1 pair) + SPL TR 996 (Adjustable Tension/Trailing Arms, 1 pair)

Included Components

• 2x SPL LCA 996 - 6061-T6 billet aluminum adjustable lower control arms (one left, one right)
• 2x SPL TR 996 - gun-drilled 6061-T6 billet aluminum adjustable tension/trailing arms (one left, one right)
• 2x 4140 CrMo Double Adjuster assemblies (electroless nickel plated)
• 4x 304 stainless steel roll center adjustment spacers
• 2x 4340 CrMo heat-treated ball joint studs
• Ti-6Al-4V titanium hardware set (blue anodized, 1/4"-20 socket head screws)
• Class 10.9 metric and SAE Grade 8 imperial hardware set
• FK PTFE-lined F1-spec spherical bearings and rod ends (pre-installed)

Product Description

The SPL Parts SPL LCAK 996 is a complete front lower control arm and trailing arm kit engineered for the Porsche 911 (996 and 997), Boxster (986 and 987), and Cayman (987C). On the 996 and 997, the kit fits both front and rear axle positions - making it the primary suspension geometry tool for the full chassis - while on the 986 and 987 platforms, it addresses the front axle only. In a single installation, the LCAK 996 unlocks five adjustable alignment parameters: camber, caster, track width, roll center, and anti-dive. Together, these adjustments allow the driver and alignment technician to precisely tailor the front suspension geometry for any combination of tires, spring rates, ride height, aero loading, and track surface - something completely impossible with the OEM rubber bushing control arm, which offers only limited eccentric bolt camber adjustment and no practical caster, track width, roll center, or anti-dive control.

The PTFE-lined FK F1-spec spherical bearings replace the OEM rubber bushings throughout, eliminating the compliance, deflection, and bind that cause camber loss under braking, vague steering feedback, and bumpsteer. The result is suspension that articulates freely and returns consistently to its set position on every bump and load cycle. SPL's proprietary Double Adjuster, machined from 4140 CrMo and finished with electroless nickel plating, uses a rotating clamp rather than jam nuts - so camber and track width are locked simultaneously with a single torquing sequence, with no risk of the setting shifting as jam nuts are tightened. The gun-drilled 6061-T6 billet aluminum trailing link and all-aluminum construction of the main arm keep unsprung weight at just 4.63 lbs (2.10 kg) per side. Ti-6Al-4V blue anodized titanium socket head screws at the adjustment clamps shave additional grams without compromise, while 304 stainless steel roll center spacers are included for precise correction of roll center height after lowering.

As a fully spherical bushing suspension kit, the SPL LCAK 996 produces a higher NVH level than OEM - road noise, felt energy from road surfaces, and some tramlining will increase, particularly in combination with other spherical bushing upgrades such as tension rod bushings. On smooth roads, the NVH character is similar to that of a factory GT3. Tire choice, pressure, and shock quality significantly influence the felt NVH; most drivers find it present and tolerable. This kit has been validated in demanding competition use, including on Eric Sutton's Solo National Championship-winning 996 Turbo. Sold as a pair covering one axle per kit. Made in the USA.