Fucking Canada. That this is too clean, I'd honestly tell him to buy another one in less than stellar condition to mod and leave this one stock/
I would go with jdm window visors:
http://www.enjukuracing.com/products...xCwRoCW7Pw_wcB
OR some cooling upgrades is always a good place to start on any car. However, these are for SR and idk if they will work on a CA18 if that's what he has:
http://www.enjukuracing.com/products...s13-89-94.html
http://www.enjukuracing.com/products...sx-silvia.html
http://www.enjukuracing.com/products...ai-subaru.html
http://www.enjukuracing.com/products...hermostat.html