Welcome to SAU , theres no skyline driving hoons ? lol , depending on the kms of your rocket , the things you should look at :
Check if your turbos are ceramic , if they are , replace with bigger steel turbos for a good power upgrade in case of ceramics exploding . Get vehicle serviced and general check over , replace timing belts if unsure of previous services espescially imports ! Compression test , i spent 8k getting work done on my R32 when i first got it just to make it bullet proof and replaced all suspension rubbers but i got a bit carried away . So i suppose if you do a few major things just for piece of mind, it will save you major head f....ks down the track , service every 5000km Put some pics in your gallery !!!!!