Using this ISR Performance V2 oil cooler kit is straightforward. First, make sure your Nissan 240sx with SR20 engine from 1989 - 1998 is turned off and cooled down. Then, install the kit according to the included instructions, connecting the - 8 AN size hoses and fittings properly. It's very important to use this kit with an upgraded radiator and a larger oil pan to keep your motor running well and reduce heat build - up. Regarding maintenance, check the black nylon braided oil hoses regularly for any signs of wear or damage. If you notice any issues, replace the hoses promptly. Also, keep in mind that ISR orders usually take a day to process. If you need the kit quickly, just give us a direct call.