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Product details
These Stage 2 heads use five-axis CNC porting of the intake, exhaust and combustion chambers for a large-bore Type 4 build. The heads require 103–105mm cylinders and are supplied as a pair with 46mm intake and 38mm exhaust Manley stainless valves. They are engine-build components rather than stock-bore replacement heads selected solely by vehicle year.
Technical Details
- Part number: 98-5323-0
- Required bore: 103–105mm
- Valves: 46mm intake/38mm exhaust
- Guides: Silicon bronze
- Seats: Hardened
- Springs: Dual
- Retainers: Chromoly
- Spark plug specification: 14mm thread, 3/4-inch reach
- Supplied: Complete head pair with valve work
Fitment & Compatibility
Fits Type 4 engines in VW Bus 1976–1979, Porsche 914 1973–1976 and 912E 1976 when built for the required bore. Three-bolt intake manifolds are required, and engine-tin modification may be needed. Verify the complete piston/cylinder, chamber, valve-train and intake combination before assembly.
