EMPI GTV-2 Dual Port Cylinder Head | VW Type 1 Aircooled | 90.5/92mm Bore, 40/35.5mm SS Valves, Dual Spring
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EMPI GTV-2 Dual Port Cylinder Head — 90.5/92mm Bore, 40/35.5mm Stainless Valves, Dual Spring
This EMPI GTV-2 dual-port cylinder head is machined for 90.5mm and 92mm pistons for 1776cc, 1835cc and 1914cc air-cooled VW Type 1 stroker builds in the Beetle, Bus, Karmann Ghia, Type 3 and Thing. It has 40mm intake / 35.5mm exhaust stainless Manley valves and dual hi-rev springs for high-lift, high-RPM cams. Sold each.
Part numbers: Head part number: not yet listed · Required lash caps: EMPI 00-4006-0 (sold separately)
Fitment
| Years | Vehicle | Notes |
|---|---|---|
| Dual-port builds | VW Beetle (Type 1) | 90.5mm or 92mm bore (1776cc / 1835cc / 1914cc) |
| Dual-port builds | VW Bus (Type 2) | Dual-port engine |
| Dual-port builds | VW Karmann Ghia | Dual-port engine |
| Dual-port builds | VW Type 3 | Dual-port engine |
| Dual-port builds | VW Thing | Dual-port engine |
Recommended for high-lift / high-RPM camshafts.
Specifications
| Spec | Detail |
|---|---|
| Bore | 90.5mm / 92mm, GTV-2 dual port casting |
| Valves | 40mm intake / 35.5mm exhaust, stainless Manley |
| Springs | Dual hi-rev, chromoly retainers, hardened keepers |
| Guides | Bronze |
| Valve job | 3-angle performance |
| Ports | 20% larger than stock |
| Spark plugs | 12mm 3/4" reach |
| Sold | Each |
What's Included
- Assembled head with stainless Manley valves, dual hi-rev springs, chromoly retainers and hardened keepers
- Rocker, exhaust and intake studs
Not Included
- Lash caps (P/N 00-4006-0), required with stainless valves
Why It Matters
The GTV-2 casting has beefed-up intake and exhaust ports, 20% larger than stock, with added material around the combustion chamber for deep fly cutting, so it allows massive porting without welding. The dual hi-rev springs are there for high-lift, higher-RPM camshaft profiles.
Installation Notes
- Lash caps (P/N 00-4006-0) are required for all stainless steel valve applications — sold separately.
- 12mm long-reach spark plugs must be used in place of stock Bosch plugs.
- Verify rocker arm geometry and check for coil bind with dual springs.
Frequently Asked Questions
What engines does this GTV-2 dual-spring head fit?
Dual-port VW Type 1 performance builds with 90.5mm or 92mm pistons (1776cc / 1835cc / 1914cc) in the Beetle, Bus, Karmann Ghia, Type 3 and Thing.
What bore are these machined for?
90.5mm and 92mm pistons (1776cc / 1835cc / 1914cc).
Why dual springs?
They're assembled with dual hi-rev valve springs for high-lift / high-RPM camshaft profiles.
Can I port them?
Yes — the GTV-2 casting has 20% larger ports and extra chamber material, allowing massive porting without welding.
Do I need lash caps?
Yes — required with stainless valves, sold separately (00-4006-0).
Anything to check when installing dual springs?
Verify rocker arm geometry and check for coil bind.
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WARNING: This product can expose you to chemicals including Lead known to the State of California to cause cancer and reproductive harm. For more information, go to www.P65Warnings.ca.gov. All parts legal for use on pre-pollution controlled vehicles only.
