EMPI GTV-2 Dual Port Cylinder Head | VW Type 1 94mm | 40/35.5mm SS Valves, Dual Spring (98-1336-B)
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EMPI GTV-2 Dual Port Cylinder Head — 94mm Bore, 40/35.5mm SS Valves, Dual Spring (98-1336-B)
The EMPI 98-1336-B is a GTV-2 dual-port cylinder head machined for 94mm pistons, for 1914cc, 2110cc, 2276cc and 2332cc air-cooled VW Type 1 big-bore builds with high-lift, high-RPM cams. It has 40mm intake / 35.5mm exhaust stainless Manley valves, dual hi-rev springs and ports 20% larger than stock. Sold each.
Part numbers: EMPI 98-1336-B (also written 981336B) · UPC 707924443448 · Required lash caps: EMPI 00-4006-0
Fitment
| Years | Vehicle | Notes |
|---|---|---|
| Dual-port builds | VW Beetle (Type 1) | 94mm bore (1914cc, 2110cc, 2276cc, 2332cc) |
| 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 |
| — | Stock 85.5mm or 90.5/92mm bore | Not confirmed |
| — | Single-port engines | Not confirmed |
| — | Type 4 engines | Not confirmed |
Specifications
| Spec | Detail |
|---|---|
| Bore | 94mm, 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, port-ready |
| Spark plugs | 12mm 3/4" reach |
| Part number | 98-1336-B |
| UPC | 707924443448 |
| 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
Dual hi-rev springs keep up with aggressive, high-RPM camshafts that single springs cannot. The GTV-2 casting adds ports 20% larger than stock and extra material around the combustion chamber for deep fly cutting, so it is ready to run or port further.
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 the EMPI 98-1336-B head fit?
Dual-port VW Type 1 big-bore builds with 94mm pistons (1914cc, 2110cc, 2276cc, 2332cc) in the Beetle, Bus, Karmann Ghia, Type 3 and Thing. It is not confirmed for 85.5mm or 90.5/92mm bores.
Why dual springs?
They handle high-lift, high-RPM camshafts that single springs can't keep up with.
What bore are these for?
94mm pistons (1914-2332cc).
Anything to check at install?
Verify rocker geometry and check for coil bind with the dual springs.
Do I need lash caps?
Yes — required with stainless valves, sold separately (00-4006-0).
What's the part number?
EMPI 98-1336-B (UPC 707924443448).
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.
