jell36 Posted April 22, 2013 Share Posted April 22, 2013 Hi everyone, I've got the Nismo cat back exhaust on my Z at the moment. I am going to get an up rev in the future (about 6 months away), my car is a daily driver and I really hate drone so..... would you get HFC's and release some more power or stick with the OEM cats? Also how much of a difference will the HFC's make in terms of power? How much louder will it make the exhaust? As to be honest I love the sound of the Nismo when I'm driving and it is perfect for what I want but I wouldn't mind it being a little louder at idle only. Also should I get Motordyne XYZ Y pipe with a HFC, resonator or straight pipe? I've read that if you use test pipes and then the HFC on the XYZ pipe then the car will still fail emissions tesitng and so I wont bother with that. If I was to keep my stock cats and then use the resonator on the XYZ would that sound good and not be too quiet? Or should I stick with stock cats and straight through pipe? Quote Link to comment Share on other sites More sharing options...
Wasso Posted April 22, 2013 Share Posted April 22, 2013 The XYZ pipe with HFC pipe will pass an MOT. I love the sound of mine and had great comments. Here's a vid clip, not the best sounding with a rear facing camera and sounds better facing the exhaust or in the car with windows open. You can skip to 1:25 in the vid, or watch from the beginning. 1 Quote Link to comment Share on other sites More sharing options...
jell36 Posted April 22, 2013 Author Share Posted April 22, 2013 Cheers Wasso, does your car have the Nismo exhaust too? Do you get any drone with your setup? Is it quiet in the cabin? Quote Link to comment Share on other sites More sharing options...
Wasso Posted April 22, 2013 Share Posted April 22, 2013 Nah standard back box and XYZ with decats and HFC cat. With that setup I get zero annoyance. Those outside the car do because I clout the LOUD pedal all too often especially in tunnels. 1 Quote Link to comment Share on other sites More sharing options...
jell36 Posted April 22, 2013 Author Share Posted April 22, 2013 Can't say I blame you for pressing the loud pedal in tunnels. Quote Link to comment Share on other sites More sharing options...
Wasso Posted April 22, 2013 Share Posted April 22, 2013 Can't say I blame you for pressing the loud pedal in tunnels. Been on a few European trips with the Zed, and when you get 10 mile long tunnels I just can't help myself, but it of course spanks the fuel all this hard acceleration just for the noise. Seriously the XYZ and decat with HFC is a great setup. Quote Link to comment Share on other sites More sharing options...
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