if you are going to run your car hard you should do mods.
mods make the engine run cooler and longersafer
best bet for a intercooler if a local scrap yard or something local on ebay
ANYthing is better then nothing
little square on the ip is the ALDA, IP= injection pump aka fuel pump
alda reads how much boost there is and give fuel accordingly, keep lines clean untill you remove it, you want to check the line off the back of the intake to the switch over valve then to the alda
when removed you control the fuel with your throttle position, so if you mash it at a stop, black smoke unburnt diesel will be blowing out, good for ppl riding ur azz, aka smoke screen
make sure all the throttle links are adjusted for full travel, not sloppy
#265 are off of 1987 300sd cars i think, bosio is told to be good but cost too much for that many people to buy them, more of a performance nozzle brand
search for diesel purge and do this before new nozzles