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4G63 Evo Oil Pans / Sumps 
Outer o-ring: 69mm inside x 77mm outer diameter
Through hole size: 2" (50
or natural aluminium
Fittings for the billet thermostat housing are available in black anodised or a raw aluminium finish
Billet Underdrive Water Pump Pulley for Nissan RB Engines Size:140mm 4G63 Evo Oil Pans /This pulley will give your engine bay a sleek, modern look and being larger diameter than the factory pulley will slow down your water pump. The pulley comes in two sizes 126mm diameter 140mm diameter Please note that the 140mm size will interfere with an aftermarket ATI Harmonic Balancer so it would be advisable to go with the 126mm size. The pulleys are CNC machined from billet 6061 T6 aluminium at our factory in Napier, New Zealand and are anodised