These lines are to replace the typical high mileage expensive leaky OEM HPOP lines that have the STC fittings. Kit comes with 3 hoses and all necessary fittings to eliminate the quick connect fittings (STC) on the heads and the HPOP itself.

All new Genuine Parker Triplelok™ fittings 
DuPont Teflon™ lining just like OEM
Burst pressure rating of 16,000psi
Working temperature rating of 400*F
Nominal working pressure is 5000psi
High quality Viton™ o-rings
The HPx line connects the two heads to help balance the high pressure oil system in each head.  It does not create more horsepower, but the majority of owners see a slight to significant decrease in engine idle noise. This is due to the helmholtz resonance that is created from the injectors firing so quickly, and the HPOP cannot react quick enough to balance/absorb on its own from back pressure spikes within the system. So when the tiny spikes happen, the HPx line sends the pressure back and forth through the heads instead of hammering on the pump itself.



Disconnect the battery grounds before installation to avoid accidentally arc'ing the line on the glow plug relay