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3.0 Liter 911 RSR Twin-Plug Heads

...The 1974 Porsche 911 RSR 3.0 liter twin-plug heads retained pretty much the same specifications as the previous year ('73 Porsche 911 RSR 2.8 liter) including the casting number, ports and valve size with only 2 big exceptions; The stud-spacing was increased from 80mm to 83mm while the combustion chamber size went up from 76.2cc to 77.2cc making these new '74 heads specific to the 3.0 liter RS and RSR racing engines.

Casting Number: 911.104.322.0R - Casting Date: 8-73 - Intake Valve Size: 49mm - Exhaust Valve Size: 41.5mm - Intake Port Size: 43mm - Exhaust Port Size: 43mm - Stud Spacing: 83mm - Combustion Chamber Volume Size: 77.2cc
#1 - 911 RSR 3.0 Liter Twin-Plug Head
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:: #3 - 911 RSR 3.0 Liter Twin-Plug Head :: 		#4 - 911 RSR 3.0 Liter Twin-Plug Head
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:: #6 - 911 RSR 3.0 Liter Twin-Plug Head ::
74 Porsche 911 RSR 3.0 Liter TP Head #2 - Photo 1
74 Porsche 911 RSR 3.0 Liter TP Head #2 - Photo 1		 74 Porsche 911 RSR 3.0 Liter TP Heads - Photo 8
74 Porsche 911 RSR 3.0 Liter TP Heads - Photo 8		 74 Porsche 911 RSR 3.0 Liter TP Heads - Photo 9
74 Porsche 911 RSR 3.0 Liter TP Heads - Photo 9

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