LS Swap Heater Bypass Block - All Female 8AN ORB Ports

Here is an important product from LOJ Conversions: The LS Swap Heater Bypass Block.  US Patent Pending...  This version of the LOJ Conversions Heater Bypass Block is manufactured with 5/8" Hose Nipples on all 4 ports of the heater block. It is supplied with a 3/8" NPT port plug and a 3/8" NPT to 1/8" NPT bushing for the installation of an aftermarket coolant temp sensor. A set screw for grounding the block is also included, and often required when installing single wire temperature sensors. Two mounting holes are integrated as well, for mounting to the vehicle chassis if desired.  For a heater block with 3/4" and 5/8" ports, CLICK HERE! For a heater block with 5/8" ports at all 4 locations, CLICK HERE! Why is this important, and why does it exist? That answer is simple and complicated. This block installs in-line with your heater hoses. You will notice in this cross section picture, that the coolant passages form an "H". The heater circuit on some Nissan vehicles (300ZX, 240SX) as well