GFB Mach 2 Recirculating Plumb Back BOV
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GFB Mach 2 Recirculating Plumb Back BOV - Subaru WRX/STI (GC8) MY97-98 / Nissan Silvia/180SX (S13) 300ZX (Z32) Pulsar GTiR (N14) - 35mm/30mm
GFB's Mach 2 uses proven TMS technology to help your turbo hold boost harder and recover up to 30% faster between gear shifts than a factory bypass valve. It's a direct bolt-in replacement for the Subaru WRX and STI, delivering sharper throttle response without any extra fittings or modifications.
This listing covers the Subaru WRX/STI (GC8) MY97-98, Nissan Silvia/180SX (S13), 300ZX (Z32), and Pulsar GTiR (N14) platforms. SKU T9135. The valve is configured as a 100% recirculating unit, with atmosphere venting kits available separately for those chasing more noise.
Note: The 300ZX (Z32) requires two valves for correct operation. The Pulsar GTiR (N14) needs the softer spring (part 6116) fitted, or the vacuum line teed into all four throttle bodies, otherwise the valve won't open properly.
Key Features
- TMS technology for faster boost recovery and improved throttle response
- Effectively unlimited boost holding capability
- Direct bolt-on replacement for the factory bypass valve — no adaptors required
- 100% recirculating design for quiet, factory-style operation
- Upgradeable to atmosphere venting with optional conversion kit or trumpet
Vehicle compatibility, OEM part numbers, and fitment notes are provided in the tabs above. Please confirm your vehicle's model year and engine configuration before ordering.
Not sure if this suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.
Vehicle Compatibility
| Make | Model | Chassis | Engine |
|---|---|---|---|
| Nissan | 180SX | S13 | SR20DET |
| Nissan | 300ZX | Z32 | VG30DETT |
| Nissan | Pulsar GTiR | N14 | SR20DET |
| Nissan | Silvia | S13 | SR20DET |
| Subaru | STI | GC8 | EJ207 |
| Subaru | WRX | GC8 | EJ20 |
Technical Specifications
| Spec | Value |
|---|---|
| Valve Type | Recirculating (Plumb Back) Blow Off Valve |
| Technology | GFB TMS (Target Manifold System) Technology |
| Port Sizes | 35 mm / 30 mm |
| Boost Holding Capacity | Unlimited (exceeds output of any turbocharger) |
| Throttle Response Improvement | Up to 30% faster boost recovery than a factory diverter valve |
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