'90 300zx na and i was looking for a throttle body space but there saying its universal so idk what the hell im doing they look different then the price range is so different. what am i looking at? im looking for gains around 3 grand and a buddy told me to get a tbs so idk any suggestions/ explanations?

 

A throttle body space won't add any power, if anything it will kill power. You want power above 3k RPM, buy a TT.

 

Buy a tt engine and make it fit... drivetrain fits... all you need is a custom FMIC with the piping that you can do yourself... for that i suggest you change the radiator for the tt aftermarket one cause it's smaller and thicker so you will get enough space arround it to pass the piping... Have fun

 

You mean a set of OEM SMIC piping and coolers

 

i figured a throttle body spacer cause its supposed to give better gas mileage and give more mid range power gains.... and i kinda was thinking of supercharging it but im not sure yet but i just cant understand whats the difference between some of the tbs

 

Supercharging won't give you better gas mileage... just an FYI.