Boundary Shims for Nissan VQ All Types VHR Kit 10/20/30 PSI 3 Shims

Boundary Shims for Nissan VQ (All Types) — VHR Shim Kit 10/20/30 PSI (3 Shims) Brand: Boundary Optimized valve timing and precise boost control for Nissan VQ engines. This VHR (Vacuum Hold Reference) shim kit includes three calibrated shims to adjust VHR settings at 10, 20 and 30 PSI , delivering reliable performance across all VQ variants. Application: Compatible with all Nissan VQ engine types Kit contents: 3 shims — 10 PSI, 20 PSI, 30 PSI Purpose: Fine-tune VHR for improved boost response, reduced lag, and consistent wastegate actuation Construction: Precision-cut shims for consistent calibration and long-term durability Easy to install for experienced tuners or mechanics, the Boundary shim kit is an essential upgrade for anyone seeking predictable boost control and repeatable performance during spirited driving or track use. Why choose Boundary: Engineered for fitment accuracy and dependable operation, these shims provide a simple, cost-effective way to tailor VHR behavior on Nissan VQ platforms.