50.500-300-NX-Black : HoseTechniques - T-Bolt Clamps NX500 Hose PY350 Hose Diesel Power Hose Silicone Vacuum & Heater Hose Oil Hose BLOW-OUT & CLEARANCE HoseTech Racing Industrial Hose Your Logo Custom Spec OEM Hoses hosetechniques, The best silicone hose on the block