Nissan 370Z Forum - View Single Post - Hi-Flow Cats too loud!

john370z · 08-21-2009, 02:12 PM

I have the exact same setup and feel the exact same way! I have added much sound deadening material which has reduced the drone by 50% but it still had that sound that hurts my hears a bit between 3K and 4K rpm. I love the gains in power but do not like the loudness. I too have been thinking of putting the stock cats back on but have not done it yet. Mine are BERK....if someone in interested in buying it might push me over the edge and sell them. Let me know what you do?

john

08-21-2009, 02:12 PM	#11 (permalink)
john370z Base Member Join Date: Jan 2009 Location: new mexico Posts: 141 Drives: 2007 335i coupe Rep Power: 283	I have the exact same setup and feel the exact same way! I have added much sound deadening material which has reduced the drone by 50% but it still had that sound that hurts my hears a bit between 3K and 4K rpm. I love the gains in power but do not like the loudness. I too have been thinking of putting the stock cats back on but have not done it yet. Mine are BERK....if someone in interested in buying it might push me over the edge and sell them. Let me know what you do? john __________________ 2009 370Z, Had Berk HFC and un-installed them cuz too noisy!, Stillen CBE, 10mm rear wheel spacer, K&N drop in filters. Blower to come...