GTV-2 Cylinder Head - 90.5mm - Dual Spring (40mm Inlet Valves, 35.5mm Exhaust Valves)

High performance GTV-2 racing dual port cylinder head from EMPI, machined to accept 90.5mm or 92mm pistons and cylinders. Designed for larger capacity Type 1 engines such as 1776cc and 1835cc builds, these heads are ideal for serious fast road and racing applications.

The cylinder head plays a vital role in engine performance by controlling airflow into and out of the combustion chamber. With intake and exhaust ports approximately 20% larger than stock, these heads significantly improve airflow, increasing power, torque and throttle response. The larger bore machining allows fitment of bigger pistons and barrels, increasing engine displacement and overall output.

Fitted with 40mm stainless steel inlet valves and 35.5mm stainless steel exhaust valves, combined with dual valve springs, these heads are built to handle higher RPM and aggressive camshaft profiles. The dual spring setup reduces valve float and ensures consistent valve control under demanding conditions.

Features

• Twin port performance cylinder head
• Machined for 90.5mm and 92mm piston & cylinder sets
• Dual valve springs for high RPM stability
• 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: 90.5mm / 92mm
• 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 matching 90.5mm or 92mm piston & cylinder kit
• Ideal for high performance and racing builds
• Dual springs recommended for performance camshafts

Recommended Additional Parts

• 90.5mm or 92mm piston & cylinder kit
• Performance camshaft and lifters
• Heavy duty rocker gear and pushrods
• Twin port inlet manifolds
• Dual carburettor setup (Weber / Dellorto / EMPI HPMX)
• Upgraded head studs and gasket set

To Fit

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

• VW Beetle – 1960–1979 – 1776cc / 1835cc / 1915cc builds
• VW Splitscreen Van – 1960–1967 – performance engine conversions
• VW Baywindow – 1968–1979 – performance engine 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