Hi, is it worthwhile using an Octane boost on an 03 sti with PPP. I'm currently just using 97 ron.

Also, is it worth decatting the exhaust? pro's and con's? I'm hearing lots of different views as the PPP exhaust should be good enough

who knows! I certainly dont )

thanks in advance

 

Here is some good info on octane boosters

Power Enhancer > Home > Octane Booster Test

Banny

 

cheers Banny. NF looks like a good bet

 

Hi I don't think you need to use octane boost just use a good quality fuel Tesco 99 or shell V power.
As for de cat I am no expert put I know the ppp exhaust is very good and not to loud.
if you do go down that route of a decat it will cost you because you will have to get a re map but there will be power gains and will sound louder