I currently have no mufflers and ran flex pipe in place of them. I love the sound, wish the sound had a little bit more rasp to it at idle. Love the sound around 2000 rpm though. I heard the spintech has a lot of rasp and sound like nascar at WOT, that would be awesome.
Which is better no exhaust or mufflers? I keep hearing I need back pressure but would think the cats and the stock exh offer enough resistance. I dont know, i am debating on whether its worth it sticking on the spin techs. I am all flowmastered out.
__________________ 2004 Yamaha R1, stock, sort of
1995 Gt 5.0 5 Spd, pretty much bone stock
1991 Dodge Diesel, mods go on and on.....
1988 Honda Hurricane 600F1, mods go on and on.....
1968 Harley XL1000, mods go on and on.......
1950 Chevy Pickup 5 Window, work in progress, Twin Turbo SBC to come..
1941 Chevy Pickup, stock | 
Exhaust Sounds 
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