GSC P-D Nissan RB26DETT 34.65mm Head STD 102.4mm Long Intake Valve - Set of 12

GSC Power-Division Intake Valves — Nissan RB26DETT, 34.65mm Head, Standard (2142-12)

A direct-replacement intake valve set for the RB26, built to GSC's valvetrain spec rather than OEM. GSC develops their valvetrain components using advanced design and flow simulation software backed by real-world testing, which is the reason these show up in built RB heads instead of factory valves.

Specs: 34.65mm head diameter, 102.4mm overall length, standard stem size. Set of 12 — one full intake side for an RB26.

Standard stem and OEM dimensions mean this drops into a stock or freshened head with no guide work and no retainer or spring changes required. That's the distinction from an oversize valve, which needs seat cutting and a valve job to suit.

When you'd want these: a high-RPM RB26 where the factory valves have seen enough heat cycles to be suspect, or a fresh build where you want known-good valvetrain rather than reusing 30-year-old parts. On an engine that lives past 8,000 rpm, valve integrity is not the place to save money.

Pair with matched springs and retainers. A valve is one piece of a system — if the build is going to see aggressive cams or high RPM, the spring package needs to suit, and GSC builds those to match.

Verify against your head before ordering. Confirm your current valve length and head diameter, especially if the head has been previously machined or has aftermarket seats.

Exhaust valves are a separate part number — most builds replace both sides at once.