What octane booster?
 

What is the better octane booster an price
and where do you get yours from ???

I use Millers octane booster plus with optimax .Till i get the 05 jdm sti zlc remap for just optimax

Millers works, and if you're going to TRAX for instance, they'll do a show price if you ask.
JohnD

I use NF from RCMS which according to an independant test on a knock engine performed the best, sum don't really do much at all.

Its a long link but explains the test in detail of some leading brands and also toluene

http://www.gtatech.com/news_au_articl.html