GTV-2 Cylinder Head - 94mm - Single Spring (40mm Inlet Valves, 35.5mm Exhaust Valves)

High performance GTV-2 racing dual port cylinder head from EMPI, machined to accept 94mm pistons and cylinders. This version is fitted with single valve springs, making it ideal for strong fast road engines and moderate performance builds where high airflow is required without the need for extreme RPM capability.

The cylinder head controls airflow into and out of the combustion chamber. With intake and exhaust ports approximately 20% larger than stock, these heads significantly improve airflow, resulting in better combustion efficiency, increased horsepower and improved throttle response. The 94mm bore machining allows use of large piston and cylinder kits, commonly used in 1915cc engine builds.

Fitted with 40mm stainless steel inlet valves and 35.5mm stainless steel exhaust valves, these heads deliver excellent flow characteristics. The single heavy-duty valve springs are suitable for standard to mild performance camshafts, offering a balance between performance, reliability and reduced valvetrain stress.

Features

• Twin port performance cylinder head
• Machined for 94mm piston & cylinder sets
• Single heavy-duty valve springs
• 20% larger intake and exhaust ports
• 40mm stainless steel inlet valves
• 35.5mm stainless steel exhaust valves
• Chromoly retainers and 3-groove collets
• 12mm spark plug thread

Specifications

• Bore size: 94mm
• Chamber volume: 56cc
• Intake port volume: 56cc
• Exhaust port volume: 66.5cc

Flow Data @ 25” Vacuum

• .100” – 55 CFM
• .200” – 87 CFM
• .300” – 113 CFM
• .400” – 130 CFM
• .500” – 137 CFM
• .600” – 141 CFM
• .650” – 142 CFM

Important Notes

• Sold individually (2 required per engine)
• Designed for twin port engines only
• Requires 94mm piston & cylinder kit
• Best suited to fast road and mild performance builds
• For high RPM or aggressive camshafts, consider dual spring version

Recommended Additional Parts

• 94mm piston & cylinder kit (1915cc setup)
• Twin port inlet manifolds
• Dual carburettor setup (Weber / Dellorto / EMPI HPMX)
• Performance camshaft (mild to moderate) and lifters
• Pushrods and rocker gear components
• Cylinder head gasket set and upgraded head studs

To Fit

Aircooled VW (Type 1 Engines – Modified / Performance Builds)

• VW Beetle – 1960–1979 – 1915cc fast road engines
• VW Splitscreen Van – 1960–1967 – performance engine conversions
• VW Baywindow – 1968–1979 – performance builds
• VW Karmann Ghia – 1960–1974 – modified twin port engines
• VW Type 3 – 1961–1973 – modified engines
• VW Trekker (Thing) – 1968–1983 – performance builds
• VW Buggy & Baja – 1960–1979 – high performance engines