GSC P-D 21-4N Chrome Polished Int Valve-39.15mm Head(+2mm)-SET 12 (Req Seat Change) Nissan GT-R 2009-2024 | 2054-12

Product Fitment: 

2009-2024 Nissan GT-R

ake your Nissan GT‑R’s engine build to the next level with the GSC Power Division 2.0mm Oversize Intake Valve, engineered specifically for the VR38DETT 3.8L V6 engine. When cylinder head machining or performance modifications require enlarged valve seats, this oversize intake valve restores proper sealing and airflow — helping ensure peak performance in high‑output applications.

Crafted from high‑grade performance materials, this valve delivers improved durability, heat resistance, and flow characteristics compared to stock components, making it ideal for boosted, high‑RPM, and competition builds.

Key Features

• Sold in set of 12

• Valve Type: Intake valve

• Oversize: +2.0mm for engines with machined valve seats

• Material: High‑grade performance alloy for strength and heat resistance

• Performance Benefits:

  • Improves airflow and combustion efficiency after headwork

  • Handles increased power levels with enhanced durability

  • Perfect for high‑boost and high‑RPM applications

  • OEM‑compatible sizing after valve job or seat cutting

Why Choose a 2.0mm Oversize Intake Valve

Standard intake valves are designed for stock valve seats and may no longer seal correctly once heads are machined during rebuilds or performance upgrades. An oversize valve is required when:

• Cylinder head seats have been cut or widened

• Performance upgrades increase airflow demand

• Engines are tuned for higher power levels and RPMs

This 2.0mm oversize intake valve ensures a proper fit, optimized airflow, and reliable performance in high‑stress environments — from street performance to motorsport applications.