IM looking into them but i see pppl post that they arent good just wondering y if u guys could help. thanx

 

in short, before the thread gets locked, throttle bottle spacers (not swapping a TB, just a spacer) does nothing for the engine, and in most cases worsens.
Crank pulley's are a love hate type of thing. Some people love them, some people hate them. theres an NST crank pulley thread of like 100 pages, read that.
basically people love them because they reduce parasitic drag on the engine, so it doesn't increase BHP, but increases WHP. people hate them, because it unbalances the engine and reduces the life span of the engine.

hope that helps. but, search some more. you'll find your answer

 

A simple search will get you plenty of results:

TBS:
https://www.scionlife.com/forums/viewtopic.php?t=195310
https://www.scionlife.com/forums/viewtopic.php?t=168150
https://www.scionlife.com/forums/viewtopic.php?t=70165

Pulley:
https://www.scionlife.com/forums/sho...d.php?t=154930 (this one should be plenty)

As with any part you add to your car, you should be prepared to do plenty of research. This involves reading. These should get you started...