Metal tank - California If using #815 CSF Heavy Duty radiator for this application, please note that there have been a few reports of interference between the fan clutch and the thicker core of the #815 radiator on a certain vehicles that are equipped with some of the aftermarket or dealer-installed air conditioning systems. Use CSF #933 or other standard capacity radiator if this problem is encountered. Vehicles with factory-installed air do not experience this problem. - CSF cap # 4502, metal tank, 1 row - Exc. California If using #815 CSF Heavy Duty radiator for this application, please note that there have been a few reports of interference between the fan clutch and the thicker core of the #815 radiator on a certain vehicles that are equipped with some of the aftermarket or dealer-installed air conditioning systems. Use CSF #933 or other standard capacity radiator if this problem is encountered. Vehicles with factory-installed air do not experience this problem. - If using #815 CSF Heavy Duty radiator for this application, please note that there have been a few reports of interference between the fan clutch and the thicker core of the #815 radiator on a certain vehicles that are equipped with some of the aftermarket or dealer-installed air conditioning systems. Use CSF #933 or other standard capacity radiator if this problem is encountered. Vehicles with factory-installed air do not experience this problem. -