Nissan R34 GTR V-Spec Rear Diffuser Nismo Fin Complete Set Dry Carbon Fiber OEM

​💎 The Legacy Component: Advanced Aero Engineering

P/N: 748A0-AA400 + 748A2-RSR45

​The Nissan Skyline GT-R V-Spec ("Victory Specification") designation was earned through advanced aerodynamic engineering, and this component is the cornerstone of that legacy.

​This is a Genuine OEM Nissan/NISMO rear diffuser assembly—the exact component that allowed the V-Spec R34 to achieve record-setting times by managing airflow beneath the chassis, reducing drag, and providing critical high-speed stability and downforce. 

This assembly is the original Advanced Aero specification unit developed by Nissan’s finest engineers and track-tested by NISMO. It integrates seamlessly with the chassis floor, working in conjunction with the front diffuser to create a fully managed underbody airflow. This critical function reduces turbulent air behind the vehicle and ensures the lowest possible coefficient of drag for maximum stability at high speeds.

​Perfect for the discerning collector or builder prioritizing period-correct components, this is more than a body kit piece—it is a verifiable piece of automotive history.

Authenticity Genuine OEM Nissan / NISMO Component Collector Grade: Guaranteed factory fitment and quality.

Material Hand-Laid Carbon Fiber Construction Lightweight, high-rigidity construction utilized on V-Spec and N1 models.

Function Advanced Aerodynamics (Venturi Effect) Dramatically increases airflow velocity beneath the car, creating effective downforce.

Assembly Complete Diffuser & Fin Assembly Includes all primary carbon sections and plastic-injected aero fins (OEM PN-stamped).

Rarity Special Order / Limited Production Produced only for the limited-run V-Spec and N1 models; a continuously sought-after part.

Identification Unique Serialization Each unit carries a specific serialized production number for absolute authenticity (e.g., CP-119052416).

Compatibility Nissan BNR34 Skyline GT-R V-Spec / V-Spec II / N1 Direct bolt-on replacement using factory mounting points. (May require V-Spec Triple Cross Bar for installation on Non-V-Spec GT-Rs).