EMPI GTV-2 Stage 1 CNC Wedge Ported Heads | VW Type 1 94mm | 40/35.5mm SS Valves, Pair (98-1431-B)
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EMPI GTV-2 Stage 1 CNC Wedge Ported Heads — 94mm, 40/35.5mm SS Valves, Pair (98-1431-B)
The EMPI 98-1431-B is a matched pair of GTV-2 dual-port cylinder heads with Stage 1 CNC wedge ports, machined for 94mm bore air-cooled VW Type 1 engines (1914cc, 2110cc, 2276cc). Stage 1 is the street/strip starting point in the CNC range. They carry 40mm intake / 35.5mm exhaust stainless Manley valves on dual hi-rev springs.
Part numbers: EMPI 98-1431-B (also written 981431B) · UPC 707924443844 · Required lash caps: EMPI 00-4006-0
Fitment
| Years | Vehicle | Notes |
|---|---|---|
| 1971-1979 | VW Beetle | Dual-port Type 1 engine, 94mm bore |
| 1971 | VW Type 2 Bus | Dual-port Type 1 engine; Bus with the Type 4 engine is not confirmed |
| 1971-1974 | VW Karmann Ghia | Dual-port |
| 1971-1973 | VW Type 3 | Dual-port |
| 1973 and 1974 | VW Thing | Dual-port |
| — | Stock 85.5mm or 90.5/92mm bore (use the matching-bore CNC head) | Not confirmed |
| — | Single-port engines | Not confirmed |
| — | Type 4 engines | Not confirmed |
Specifications
| Spec | Detail |
|---|---|
| Bore | 94mm, GTV-2 dual port casting |
| Port | Stage 1 CNC wedge, cut on a 5-axis CNC mill |
| Valves | 40mm intake / 35.5mm exhaust, stainless Manley |
| Springs | Dual hi-rev, chromoly retainers, hardened keepers |
| Guides | Bronze |
| Valve job | Performance 3-angle |
| Spark plugs | 12mm 3/4" reach |
| Part number | 98-1431-B |
| UPC | 707924443844 |
| Sold as | Matched pair |
What's Included
- Two heads with valves, dual springs, chromoly retainers, hardened keepers and bronze guides
- Rocker, exhaust and intake studs
- Custom intake gasket
Not Included
- Lash caps (P/N 00-4006-0), required with stainless valves
Why It Matters
CNC-ported heads take the guesswork out of porting: every port is cut the same on a 5-axis mill, ready to bolt on. Stage 1 is the street/strip port, well-suited to 1914–2110cc builds; Stage 3 adds larger valves and a more aggressive wedge for maximum flow.
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 VW engines do the EMPI 98-1431-B heads fit?
Dual-port VW Type 1 builds with 94mm bore (1914cc, 2110cc, 2276cc) in the 1971-1979 Beetle, 1971-1974 Karmann Ghia, 1971-1973 Type 3, Thing and the 1971 Bus. Type 4 engines are not confirmed.
What does CNC porting get me?
Consistent, repeatable port work cut on a 5-axis mill — ready to bolt on, no hand porting needed.
What bore are these for?
94mm pistons (1914-2276cc).
How does Stage 1 compare to Stage 3?
Stage 1 is the street/strip port; Stage 3 has larger valves and a more aggressive wedge port for maximum flow.
Do I need lash caps?
Yes — required with stainless valves, sold separately (00-4006-0).
Sold each or as a pair?
Matched pair. The part number is EMPI 98-1431-B (UPC 707924443844).
Explore Related Categories
Engine Parts · All VW Air-Cooled · VW Beetle
Prop 65 Warning
WARNING: This product can expose you to chemicals including lead which are 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.
