EMPI GTV-2 Dual Port Cylinder Head | VW Type 1 Aircooled | 85.5mm, 40/35.5mm SS Valves, Single Spring (98-1381-B)

EMPI GTV-2 Dual Port Cylinder Head — 85.5mm Bore, 40/35.5mm Stainless Valves, Single Spring (98-1381-B)

If you want a head that can grow with your build, the GTV-2 casting is the one to start from. EMPI's GTV-2 dual-port head (98-1381-B) has intake and exhaust ports 20% larger than stock and extra chamber material for deep fly-cutting — run it as-is for strong performance, or hand/CNC port it from mild to wild. Machined for 85.5mm bore with 40×35.5mm stainless Manley valves and single hi-rev springs. Sold each.

Vehicle Fitment

• VW Beetle: 1971–1979 (dual-port, 85.5mm or 87mm pistons)
• VW Bus: 1971 and later (dual-port)
• VW Karmann Ghia: 1971–1974
• VW Type 3: dual-port builds
• VW Thing: dual-port builds

Not confirmed: big-bore 90.5/92/94mm builds (use the matching-bore GTV-2 head), single-port engines, Type 4 engines.

Why Choose EMPI?

You get genuine parts backed by real support.

Key Features & Benefits

• Port-ready GTV-2 casting: 20% larger intake and exhaust ports than stock, with added material around the combustion chamber for deep fly cutting.
• Stainless Manley valves: 40mm intake / 35.5mm exhaust.
• Single hi-rev valve springs: with chromoly retainers and hardened keepers.
• Bronze valve guides: for durability.
• 3-angle performance valve job.
• Studs included: rocker, exhaust, and intake studs.
• Sold each.

Technical Specifications

• Bore: 85.5mm, GTV-2 dual port casting
• Valves: 40mm intake / 35.5mm exhaust, stainless Manley
• Springs: single hi-rev
• Ports: 20% larger than stock, ready for hand/CNC porting
• Spark plugs: 12mm 3/4" reach
• Part Number: 98-1381-B (UPC 707924430769)

Important: Lash caps (P/N 00-4006-0) are required for all stainless steel valve applications — sold separately. 12mm long-reach spark plugs (e.g. NGK D8EA) must be used in place of stock Bosch plugs.

Frequently Asked Questions

• Can I port these? Yes — the GTV-2 casting has 20% larger ports and extra chamber material specifically so you can hand or CNC port from mild to wild.
• What bore do they fit? 85.5mm or 87mm pistons.
• What spark plugs? 12mm 3/4" long-reach (e.g. NGK D8EA), not stock Bosch.
• Do I need lash caps? Yes — required with stainless valves, sold separately (00-4006-0).
• What's the part number? EMPI 98-1381-B (UPC 707924430769).
• Are you an authorized dealer? Yes.

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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.