Lamborghini Aventador SVJ Rear Spoiler Carbon 470854871B

the part number 470854871B refers to the Rear Spoiler (Rear Wing) Assembly for the Lamborghini Aventador SVJ (LP770-4).

This is not just a cosmetic wing; it is a primary component of the ALA 2.0 (Aerodinamica Lamborghini Attiva) system. The wing is hollow and features internal air channels that allow the car to perform “aero-vectoring” by stalling the wing’s downforce on specific sides during high-speed cornering.

1. Technical Identification

• Part Number: 470854871B

• Material: Forged Composites® or Pre-preg Carbon Fiber (depending on the specific trim/finish option).

• Technology: ALA 2.0 Integrated. This wing works in conjunction with the electronic actuators located in the rear engine deck to manage airflow through the hollow stanchions and out through the slots on the underside of the wing.

• Compatibility: This wing is specific to the SVJ. It cannot be retrofitted to a standard Aventador or Aventador S without the entire rear decklid assembly and the ALA control modules.

3. Critical “B” Revision Details

The “B” suffix is vital. The early “A” versions of the SVJ wing occasionally suffered from minor hairline fractures near the central mounting stanchion due to the immense downforce loads (up to $490\text{ kg}$ at top speed). The “B” revision features:

• Reinforced Internal Ribbing: Increased structural integrity at the mounting points.

• Improved Aero-Gate Seals: Better gaskets where the air enters from the engine deck to ensure no pressure loss in the ALA system.

4. Installation & ALA Calibration

• Aero-Vectoring Check: If you are replacing a damaged wing, you must ensure the air-flap actuators in the rear decklid are functioning. If the internal channels of the new wing are blocked or the seals are misaligned, the car will throw an “ALA System Failure” error at speeds over $70\text{ mph}$.

• Torque Specs: The mounting bolts require precise torqueing. Over-tightening can crack the carbon fiber structure of the wing, while under-tightening can lead to catastrophic failure under high aero-load.

• Finish: The wing is available in Matte Carbon or Gloss Carbon. Ensure you verify which finish matches your vehicle’s “Exterior Carbon Package.”