GSC Intake Valve Guide – Toyota/BMW B58/S58 – GSC3132
Precision Intake Valve Guide for B58 & S58 Engines
The GSC Power-Division Intake Valve Guide is built for Toyota B58B30 and BMW S58 platforms, offering a 5mm valve stem fitment and a stopper-style protrusion for secure installation. This guide is ideal for performance builds or OEM-style head work requiring consistent valve control and long-term reliability.
Fitment and Compatibility
Sold individually. A complete intake setup requires 12 guides. Oversized options are available in +0.001" and +0.003" for tighter tolerances or custom-machined heads. Compatible with OEM hat-style valve stem seals or metal clad seals when using alternate spring seat configurations.
Key Features
- 5mm valve stem fitment for B58 and S58 engines
- Stopper protrusion for quick install and anti-drop protection
- Seal flexibility with OEM or metal clad options
Specifications
| Stem Diameter | Total Length | Outer Diameter | Stopper Protrusion |
|---|---|---|---|
| 5mm | 42mm / 1.654" | 10.03mm / 0.3948" | 16.5mm / 0.650" |
Fitment:
- 2016–2023 BMW M240i / M340i / M440i 3.0L Turbo Inline-6 (B58B30)
- 2020–2025 BMW M3 / M4 / X3M / X4M 3.0L Twin Turbo Inline-6 (S58)
- 2021–2025 Toyota GR Supra 3.0L Turbo Inline-6 (B58B30)
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