Sparco Passenger Side Seat Base For Nissan Skyline R34

Nissan Skyline R34 owners upgrading to high-performance seating know that every component in the cockpit must deliver strength, precision, and perfect fitment. This Sparco 600 Series passenger-side seat base (600SB436L) offers a direct bolt-in solution engineered specifically for all R34 Skyline models. It mounts cleanly to the factory floor mounting points with no cutting or welding required, creating a strong, flat platform with pre-drilled holes that align perfectly with Sparco seats.
Built from heavy 3/16-inch steel, the wide base allows for the lowest possible seating position when side-mounted, significantly improving center of gravity and enhancing driving dynamics on both street and track. When combined with the SPA00493 track set and SPA50001ZN hardware kit, it provides smooth forward-and-back adjustment while keeping the entire system simple and secure. The result is a transformed passenger cockpit that feels planted, supportive, and fully prepared for performance driving.
Designed exclusively for Sparco seats, this passenger-side base delivers professional-grade strength and precise fitment that outperforms generic adapters, giving R34 Skyline owners the confidence to complete a factory-quality racing seat installation the right way. 

• Direct bolt-in fitment for Nissan Skyline models (R34 generation) using original factory seat mounting points — no cutting or welding required
• Specifically engineered for the passenger side (left side) seat position
• Heavy-duty 3/16" steel construction with a wide platform for the lowest possible seating position
• Allows side-mount drilling for optimal low hip point and improved center of gravity
• Requires one Sparco Track Set (SPA00493) per seat for smooth forward and backward adjustment
• Requires appropriate Sparco hardware kit (SPA50001ZN bottom-mount recommended for street seats or side-mount for competition seats)
• Designed exclusively for Sparco seats — pre-drilled holes match Sparco bolt pattern (not guaranteed for Recaro or other brands without adapters)
• Professional installation strongly recommended for correct torque specs, seat alignment, belt routing, and safety compliance
• Delivers a strong, flat mounting surface that transforms your R34 cockpit for both street comfort and track performance