MrChow Posted August 5, 2016 Share Posted August 5, 2016 I've got a Scorpion back box combined with the oem Y pipe and silenced decats (make im unsure of). whenever I rev the car and the revs are falling or I'm on overrun after acceleration, the system makes a rasp as the revs drop. I've been told it's back pressure, but it's starting to get a tad annoying. I've checked to see if there are any splits or blows in the system but 'Nada! can someone shed some much needed light on this. and would an aftermarket Y pipe help? cheers guys Quote Link to comment Share on other sites More sharing options...
StevoD Posted August 5, 2016 Share Posted August 5, 2016 I'm 90% sure the noise will be as a result of the decats Quote Link to comment Share on other sites More sharing options...
MrChow Posted August 5, 2016 Author Share Posted August 5, 2016 is there anyway to eliminate it? Quote Link to comment Share on other sites More sharing options...
ZedManTID Posted August 5, 2016 Share Posted August 5, 2016 (edited) Mines the same and I agree, it's annoying. I have an aftermarket y aswell Edited August 5, 2016 by ZedManTID Quote Link to comment Share on other sites More sharing options...
Ekona Posted August 5, 2016 Share Posted August 5, 2016 is there anyway to eliminate it? Yes, put the cats back in. Quote Link to comment Share on other sites More sharing options...
MrChow Posted August 6, 2016 Author Share Posted August 6, 2016 is there anyway to eliminate it? Yes, put the cats back in. or turn the stereo up! Quote Link to comment Share on other sites More sharing options...
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