Porsche OEM GT3-Style Lower Control Arms — Pair

OEM GT3 Adjustable Lower Control Arm Set

Technical guide downloads

• Download Guide 01: GT3-Style Lower Control Arms (PDF, 6 pages)

Know what you'd like the car to do better, but not which parts to choose? Start with our Porsche Suspension Selection Guide.

Ordering quantity: 1 = one left-and-right pair (2 arms).

Front or rear on applicable Porsche models; see the chassis and model-year applications below.

Note: these are sold as a left+right pair (price shown is for TWO arms) and are supplied complete with all ancillary parts - $1100 value elsewhere. Get all parts shown at one price.

For vehicles where these arms fit both axles, two pairs cover front and rear; 991 and 992 applications are front-only.

Need links as well as control arms?

Choose a pack only if its included components match your planned work. Each pack includes one pair of each component listed and one lower-control-arm pair.

• Mega-Pack #1 — 997/987: lower control arms, front tension links, rear thrust arms and rear toe links. $1,175; save $208 versus buying these components individually.
• Mega-Pack #2 — 997/987: lower control arms, front tension links and rear thrust arms. $998; save $176 versus buying these components individually.
• Mega-Pack #3 — 996/997/986/987: lower control arms, front tension links and rear toe links. $925; save $163 versus buying these components individually.

Need help choosing the axle or a suspension pack? Email us your model year, exact model/trim, front or rear axle, and current suspension modifications. Include your intended use and alignment goals so we can help you select the right components.

Derived from Porsche GT3 suspension architecture, these adjustable lower control arms provide expanded front axle camber capability while retaining OEM design integrity, durability, and ride compliance.

The two-piece shim-adjustable arm design allows precise camber tuning for track or performance street applications while improving front-end grip, steering precision, and tire contact control under load. Additional negative camber is built into the arm geometry before shim adjustment, with further correction of ±2 degrees available through the included shim packs.

Forged aluminum arm bodies combine low unsprung mass with high structural rigidity, while OEM-style elastomer bushings preserve isolation and service life appropriate for road and dual-purpose use.

Kit Includes

• Left and right OEM GT3-type lower control arms (one complete pair)
  
• Inner bushing sections
  
• Complete camber shim sets (1mm, 1.5mm, 3mm, 7mm) for each arm (8 shims total)
  
• Litronic headlamp correction brackets
  
• Thrust arm spacers for applicable chassis
  
• Caster-adjustable thrust arm bushings
  
• Installation hardware (4X double-ended studs, 8mm spacers, locking nuts)
  

NO EXTRA PARTS TO BUY - all required ancillary components are included.

Technical Features

Replaces these OEM part numbers:

• 996-341-121-90

• 996-341-122-90

• 996-341-441-90

GT3 Shim Adjustment System

Allows repeatable camber adjustment through calibrated shim changes rather than eccentric-only adjustment.

Increased Static Negative Camber

Provides additional front or rear axle camber relative to standard non-GT control arms, improving turn-in and outer shoulder support under cornering load.

Forged OEM Construction

High-strength forged aluminum construction designed for motorsport-derived loading while maintaining factory serviceability. 

Geometry Correction for Lowered Cars

Particularly beneficial where ride height changes have reduced available alignment range.

OEM Ride and NVH Characteristics

Retains compliant bushing behavior absent the noise, harshness, and maintenance associated with spherical-bearing race arms.

Applications

Applications by U.S. model year:

• 986 Boxster — 1997–2004 — front or rear
• 996 Carrera / Turbo families — 1999–2005 — front or rear; model-dependent
• 997 Carrera / C4 / Turbo families — 2005–2013 — front or rear; model-dependent
• 987 Boxster — 2005–2012 — front or rear
• 987 Cayman — 2006–2012 — front or rear
• 981 Boxster — 2013–2016 — front or rear
• 981 Cayman — 2014–2016 — front or rear
• 991 911 — 2012–2019 — front only
• 718 Boxster / Cayman (982) — 2017 onward — front or rear
• 992 Carrera — 2020 onward — front only

U.S. model years shown. Year ranges cover each model family and do not mean every trim was offered in every year. Confirm your exact chassis, trim and axle with LPM, including GT variants and vehicles from other markets. Use the included spacer set where required for the application; 991 and 992 applications are front-only.

Notes

• Alignment required after installation.
  
• Recommended for performance street, DE, autocross, and track use.
  
• Litronic brackets included only to be used for vehicles equipped with factory headlamp leveling systems.
  
• Thrust arm spacers included where required, rather than offered as separate add-ons - not necessary to use in all applications.
  
• A factory-style solution for increased alignment range without moving to full race control arm assemblies.