Port Cylinder Head

porsche
Porsche_911SC_Big_Port_Cylinder_Heads_Rebuilt_39mm_Large_Intake_Ports_1978_1983_01_npr

Porsche 911SC Big Port Cylinder Heads Rebuilt 39mm Large Intake Ports 1978-1983

They are early heads US and feature the large 49mm intake valves and 41.5mm exhaust valves and 39mm intake ports, 35mm exhaust ports. They are threaded for US air injection in the exhaust ports and can be plugged - we have proper stainless plugs with the correct thread and seal washers available if no air injection is used (not included). These early cylinder heads are date-stamped 9-77, and the date-stamps on 2 of the heads are not visible due to refacing them. They have all been refaced to the same height. Please check out the photos, this is a truly excellent set of big port 3.0 cylinder heads. These were…
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Porsche_911SC_Big_Port_Cylinder_Heads_1978_1979_Rebuilt_39mm_Large_Intake_Ports_01_dbr

Porsche 911SC Big Port Cylinder Heads 1978 1979 Rebuilt 39mm Large Intake Ports

They feature the large 49mm intake valves and 41.5mm exhaust valves and 39mm intake ports, 35mm exhaust ports. These were also used on Euro 80-83 911SCs. These cylinder heads were fully refurbished by Ollie's many years ago and the engine they came off was rebuilt with another set of modified twin plug heads. Please check out our store for many rare or hard to find Porsche parts. The item "Porsche 911SC Big Port Cylinder Heads 1978 1979 Rebuilt 39mm Large Intake Ports" is in sale since Monday, July 1, 2019. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Other". The seller is "bengel512" and…
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Porsche_901_911_1964_1967_Cylinder_Heads_2_0_liter_SWB_39_35_valves_32_32_ports_01_aw

Porsche 901 911 1964-1967 Cylinder Heads 2.0 liter SWB 39/35 valves 32/32 ports

These cylinder heads have been refurbished with new guides and Wrightwood Racing Teflon valve stem seals and have been refaced by 0.25mm (0.010 in) for a perfect seal to the cylinders. Ether run them as they are for a slightly improved compression or use the factory thicker cylinder base shims to make up for the 0.25mm they have been shaved. All studs/ hardware have been re-plated with Zinc-yellow Trivalent Chromate or replaced as needed as shown in the photos. Please check out the photos closely. These are very decent heads with minimum pitting in the combustion chambers and the ports look very good. Porsche part number for each head is…
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Porsche_911_2_5_914_6_GT_ST_RS_Twin_Plug_Cylinder_Heads_Refurbished_Ported_38_38_01_qs

Porsche 911 2.5 914-6 GT ST RS Twin Plug Cylinder Heads Refurbished Ported 38/38

The valve seats are excellent, not machined or lapped in far for excellent compression, valves are original 46mm intakes and sodium filled 40mm exhaust valves, same as the 73 Porsche 911 Carrera RS had, ports are large 38/38mm beautifully ported and polished, valve springs are new Aase Brothers /Aasco Motorsports with light weight titanium retainers, spark plugs are both 14mm for an easy selection of plugs, the heads have been chamfered/beveled for 86.7mm cylinders - these heads are perfect for your screaming 2.5 liter 911 engine. They were built for a 914-6GT 2.5 liter spare engine and plans changed. Freshly plated studs are included - not shown in the photos.…
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