Can this arm be used on the rear of the 996 and 997 as well as the front?

Yes. The LCA 996 V2 fits both the front and rear positions on the 996, 997, and 986. On the 987 Boxster and Cayman, it fits the front only. For a complete front and rear control arm upgrade on a 996, 997, or 986, two pairs are required; one for each axle. Each pair covers one vehicle end.

What does Porsche's own track width progression tell us about the LCA V2's track width adjustment?

Porsche has added nearly 5 inches of front track width to the GT3 since the 996 and nearly 3 inches to the Boxster/Cayman since the 986; a continuous widening driven by the grip benefits of a wider front stance. The LCA 996 V2's track width adjustment allows 996, 997, and 986/987 owners to access that same geometry advantage, bringing the front stance closer to modern GT-spec dimensions and reducing the lateral load transfer that shifts weight off the inner tire and onto the heavily loaded outer.

How does roll center correction reduce body roll without changing spring rates?

The roll center is the geometric point the chassis rolls around during cornering. The vertical distance between the roll center and the center of gravity acts as a lever arm; the longer that lever, the more roll moment is generated by a given cornering force. Lowering the car drops the roll center faster than it drops the center of gravity, extending that lever arm and increasing body roll. Raising the roll center back up via the stainless steel spacers shortens the lever arm and reduces the roll moment at the same spring rate; the car rolls less without requiring stiffer springs that would compromise ride quality.

What is the NVH tradeoff, and how does SPL characterize it?

SPL characterizes the NVH as present and tolerable for most drivers; comparable to an OEM GT3. Replacing rubber bushings with spherical bearings increases transmitted road noise and felt energy from rough surfaces because the rubber's compliance is removed. On smooth roads, ride quality actually improves because the shock absorber can work without bushing bind fighting its travel. The felt energy on rough roads can be reduced by running more compliant tires, optimizing tire pressure, and using a quality shock with appropriate compression damping settings.

Are replacement rod ends available for the LCA 996 V2?

Yes. SPL Parts offers replacement rod ends for the LCA 996 V2. Contact SPL Parts directly or use the maintenance parts link on the SPL Parts product page for the correct replacement.

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Description

SPL Parts Adjustable Lower Control Arms for 99x / 98x Porsche 911 / Boxster / Cayman

Most Porsche 996, 997, 986, and 987 owners looking at suspension upgrades start with springs, shocks, and alignment. The alignment stops where the factory control arms stop; the eccentric bolt travels through a fixed arc, camber and track width are locked in at whatever the arm’s geometry allows, and the roll center sits wherever lowering moved it. The SPL LCA 996 V2 adjustable control arms change that. These are the adjustable control arms that give the 996, 997, 986, and 987 the front geometry capability that Porsche’s own factory GT3 evolution has been pursuing for two decades. Porsche has widened the GT3’s front track width by nearly 5 inches since the 996 generation and the Boxster/Cayman’s by nearly 3 inches since the 986; not for cosmetics, but because wider front control arms mean less lateral load transfer per unit of cornering force and more available peak grip. The SPL LCA 996 V2 control arms put that track width adjustment in the owner’s hands, alongside independent camber adjustment and roll center correction; three geometry variables, one arm, no compromises.

Features

Adjustable control arms providing three independent geometry adjustments: camber, roll center, and front track width
PTFE-lined, F1-spec, self-cleaning FK spherical bearings manufactured in the USA; eliminates OEM rubber bushing deflection at every control arm bushing position
11% lighter than OEM control arms; 2.86lbs (1.30 kg) per side; 6061-T6 billet aluminum arm anodized black
4140 Chromoly Double Adjuster, electroless nickel-plated; 360-degree rotating clamp locks without jam nuts
304 stainless steel roll center adjustment spacers in multiple sizes; works with heat-treated 4340 Chromoly ball joint stud
Class 10.9 metric hardware; SAE Grade 8 imperial hardware; Ti-6Al-4V titanium socket head allen screws anodized blue
Control arms can be installed on the front or rear of the 986, 996, and 997; front only on the 987 Boxster and Cayman

Specifications

Body Material: 2024-T351 aluminum (gun-drilled, black anodized)
Bushings: PTFE-lined F1-fit FK USA spherical bearings
Adjustment: Track width, camber, and roll center
Hardware: Heat-treated chromoly with high-misalignment studs
Origin: Made in the USA

Applications

Porsche 911 Carrera: 996, 997 | 1999-2012
Porsche 911 Carrera 4: 996, 997 | 1999-2012
Porsche 911 Carrera 4S: 996, 997 | 2002-2012
Porsche 911 Carrera S: 997 | 2005-2012
Porsche 911 Turbo: 996, 997 | 2001-2012
Porsche 911 Turbo S: 997 | 2010-2012
Porsche 911 GT2: 996, 997 | 2002-2012
Porsche 911 GT2 RS: 997 | 2010-2012
Porsche 911 GT3: 996, 997 | 1999-2012
Porsche 911 GT3 RS: 996, 997 | 2004-2012
Porsche Boxster: 986, 987 | 1997-2012
Porsche Boxster S: 986, 987 | 1997-2012
Porsche Cayman: 987 | 2005-2012
Porsche Cayman S: 987 | 2005-2012

Notes

Installation Instructions
Replacement rod ends available from SPL Parts, please contact us
SPL components are made-to-order in the USA; build time will be confirmed at the time of order.

Frequently Asked Questions

Can these control arms be used on the rear of the 996 and 997 as well as the front? Yes. The LCA 996 V2 control arms fit both the front and rear positions on the 996, 997, and 986. On the 987 Boxster and Cayman, the control arms fit the front position only. For a complete front and rear control arm upgrade on a 996, 997, or 986, two pairs are required; one for each axle.
Why has Porsche consistently widened the front track width of GT3 control arms with every generation? Porsche has added nearly 5 inches of front track width to the GT3 since the 996 and nearly 3 inches to the Boxster/Cayman since the 986 because wider front control arms reduce lateral load transfer per unit of cornering force. Less load transfer means better inner tire utilization and more available peak grip. The LCA 996 V2 control arms allow 996, 997, 986, and 987 owners to access that same track width advantage by adjusting the arm length beyond the factory dimension.
How does roll center correction through the control arm reduce body roll? The roll center is the geometric point the chassis rolls around during cornering. The distance between the roll center and the center of gravity determines how much leverage exists to produce roll. Lowering the car moves the roll center down faster than the center of gravity, extending that lever and increasing roll at the same spring rate. The stainless spacers in these control arms correct the roll center height, shortening that lever arm and reducing body roll without requiring stiffer springs.
What is the NVH tradeoff when replacing factory rubber-bushed control arms with these? SPL characterizes the NVH as present and tolerable for most drivers; comparable to an OEM GT3. The spherical bearings in the control arms transmit more road noise and felt energy on rough surfaces than rubber bushings. On smooth roads, ride quality improves because the shocks can work without bushing bind. More compliant tires, adjusted tire pressure, and quality shock absorbers with appropriate compression settings reduce the felt energy for daily-driven builds.
Are replacement rod ends available for the LCA 996 V2 control arms? Yes. Replacement rod ends for the LCA 996 V2 control arms are available from Bulletproof Automotive. Contact the Bulletproof sales team for the correct replacement.

About SPL Parts

SPL Parts is a USA-based manufacturer of high-performance suspension components engineered for both professional racing and demanding street applications. Built on the core principles of strength, lightweight construction, low friction, and precision, SPL Parts products deliver the adjustability and alignment performance required by top race teams and discerning enthusiasts alike. Every component is produced using USA-sourced, certified materials and machined by experienced local shops to exacting tolerances. Professional TIG welders ensure maximum weld integrity, while each part is hand-fitted and treated with anti-seize and 3M internal panel coating for lasting protection. SPL Parts conducts all research and development in-house, allowing the team to leverage firsthand product knowledge and deliver unmatched customer support. Their suspension components feature innovative adjuster designs for quicker, more precise alignments, and utilize spherical bearings with Teflon liners that are self-cleaning, self-lubricating, and built for long service life. From concept to assembly, SPL Parts is made with pride in the USA by skilled machinists and welders who are committed to quality, innovation, and performance.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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SPL Parts Adjustable Lower Control Arms for 99x / 98x Porsche 911 / Boxster / Cayman [SPLLCA996V2]

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SPL Parts Adjustable Lower Control Arms for 99x / 98x Porsche 911 / Boxster / Cayman

Features

Specifications

Applications

Notes

Frequently Asked Questions

About SPL Parts

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