Don't bother with the kits by GReddy or Blitz, they are very expensive for what they are. You can get all the bits you need from Think Auto. 19 row 235mm cooler fits nicely in the passenger side. Definitely use proper braided hose with threaded unions not the push fit stuff. If you want a cooler as well you will need 1 oil filter takeoff (go for the side entry one - there's more room), 1 remote filter mount, an oilstat and the cooler. You can't use one of the takeoffs with a built in thermostat with a remote filter or you'd only get filtered oil when it got hot!
You go from the takeoff to the remote filter, then from there to the oilstat and back to the takeoff. The other side of the oilstat goes to the cooler. So you need 5 lengths of hose with 10 connectors. Some of these are best made with 90 degree connectors. Then you need 4 male-male unions to hook up those to the takeoff and remote filter mount. You need to decide where you are going to put everything before you can decide what connectors etc you need. I have the remote filter under the car and the oilstat on the sidewall. Oh, and make sure you use bonded seals between the male-male unions and the takeoff plate/remote filter mount if they are BSP threads or PTFE tape if they are NPTF threads otherwise they will leak.
Done properly it will be absolutely fine. The oil cooler makes a big difference on track. I was getting very high oil temps after only 10 minutes or so, now I can happily lap away without a problem. I can look out the list of parts I used if you want. In fact, I think it's already posted on here somewhere.