N249 bypass problem

cupraNCS

Active Member
Apr 9, 2007
90
0
Port Glasgow
Done the n249 bypass today and had also read on a thread here that yo needed to then adjust your dump valve( i have forge split-r) the problem is that i am now getting a lot of rattling from the dump valve, i have managed to get it to a setting where it dosnt rattle but was just wondering if anybody had an idea why this is happening??