EMPI GTV-2 Stage 1 CNC Wedge Ported Heads | VW Type 1 94mm | 40/35.5mm SS Valves, Pair (98-1431-B)

EMPI GTV-2 Stage 1 CNC Wedge Ported Heads — 94mm, 40/35.5mm SS Valves, Pair (98-1431-B)

CNC-ported heads take the guesswork out of porting — every port cut the same, ready to bolt on. EMPI's GTV-2 Stage 1 wedge-port heads (98-1431-B) are machined on a 5-axis CNC mill for 94mm bore, with 40×35.5mm stainless Manley valves and dual hi-rev springs.

Stage 1 is the street/strip starting point in the CNC range, well-suited to 1914–2110cc builds. Sold as a matched pair.

Vehicle Fitment

• VW Beetle: 1971-1979
• VW Bus: 1971-1979
• VW Karmann Ghia: 1971-1974
• VW Type 3: 1971-1973
• VW Thing: 1973-1975

Confirmed: VW Type 1 dual-port big-bore builds running 94mm bore — 1914cc, 2110cc, 2276cc. Not confirmed: stock 85.5mm or 90.5/92mm bore (use the matching-bore CNC head), single-port engines, Type 4 engines.

Why Choose EMPI?

EMPI's GTV-2 CNC heads are cut on a 5-axis mill for consistent, repeatable porting.

Key Features & Benefits

• 94mm bore, GTV-2 dual port casting.
• Stage 1 wedge-port CNC machining: cut on a 5-axis CNC mill.
• 40mm intake / 35.5mm exhaust stainless Manley valves.
• Dual hi-rev valve springs.
• Chromoly retainers and hardened keepers.
• Bronze valve guides.
• Custom intake gasket included.
• 12mm 3/4" reach spark plug holes.
• Rocker, exhaust, and intake studs included.
• Performance 3-angle valve job.
• Sold as a matched pair.

Technical Specifications

• Valves: 40mm intake / 35.5mm exhaust, stainless Manley
• Springs: dual hi-rev
• Port: Stage 1 CNC wedge
• Spark plugs: 12mm 3/4" reach
• Part Number: 98-1431-B | UPC: 707924443844
• Sold as: matched pair

Frequently Asked Questions

• 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.
• Sold each or as a pair? Matched pair.
• What's the part number? EMPI 98-1431-B (UPC 707924443844).
• Are you an authorized dealer? Yes.

Installation

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.

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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.