GSC Power Division Exhaust Valve Guide – +0.003" Oversize Single w/ Stopper (Nissan RB26DETT / SR20DET) – GSC3129.003-1
The GSC Power Division +0.003" Oversized Exhaust Valve Guide is precision-engineered for Nissan RB26DETT and SR20DET engines. Featuring a stopper-style configuration, this guide offers secure seating and enhanced valve stem control—perfect for cylinder heads that have been machined or require tighter clearances.
Fitment & Options
- RB26DETT: Sold individually or in sets of 12
- SR20DET: Sold individually or in sets of 8
- Oversized Variants: Available in +0.001" and +0.003" for custom-fit head work
Specifications
- Total Length: 1.692 in / 42.98 mm
- Outer Diameter: 0.4342 in / 11.03 mm
- Valve Stem Diameter: 7 mm
Whether you're refreshing a stock head or building for high-performance use, GSC3129.003-1 delivers the precision and reliability trusted by engine builders worldwide.
Fitment:
Nissan RB26DETT – 2.6L DOHC Inline-6 Turbo
- 1989–2002 Nissan Skyline GT-R (R32, R33, R34)
- 1990s–present RB26-swapped builds (240SX, Z32, Datsun, etc.)
Nissan SR20DET – 2.0L DOHC Inline-4 Turbo
- 1989–1994 Nissan Silvia S13
- 1995–1998 Nissan Silvia S14
- 1999–2002 Nissan Silvia S15
- 1991–1994 Nissan 180SX (Redtop/Blacktop)
- 1990s–present SR20DET-swapped builds (B13 Sentra, Datsun 510, AE86, etc.)
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