Bugpack "Wedgeport" "049" Casting 5-Axis CNC Ported Cylinder Heads (Port Design by VW Legend Shaun McCarthy), 42 x 37.5mm Valves, 90.5/92mm, or 94mm Bore, PAIR, 4003-27 and 4003-28 - Aircooled.Net VW Parts
Ahnendorp B.A.S. - Cylinder Heads Dual Port VW type 1 044 HD, NEW version, M14 long spark plug, set
Big Valve Cylinder Heads; Ported and polished, (pr) Part # 1101355P
Ahnendorp B.A.S. - Cylinder heads dual port VW Beetle Eliminator HD RACING version including machining for bigger cylinders 90,5-94mm, valve seats machined for super finish cut, including porting and machining your manifolds
Vw ported dual port heads - auto parts - by owner - vehicle automotive sale - craigslist
VW Type I port and polish heads tips and tricks - YouTube
Cylinder head porting, how far to go? - Aircooled VW South Africa