Hi, a few questions i dont know the answer to 
firstly ive been looking at fse boost valves on the web, are they any good? also can u fit a dump valve to these?
Secondly to upgraded spark plugs really make a difference?
Thanks
btw its a 1.6vtr

firstly ive been looking at fse boost valves on the web, are they any good? also can u fit a dump valve to these?
Secondly to upgraded spark plugs really make a difference?
Thanks
btw its a 1.6vtr
