I have Motordyne ART pipes on my Nismo with stock pipes for a little over a month before I got my new exhaust (AAM). It is a little quitter and deeper than the FI and there is little to no hiss. The only time I notice hiss was during down shifting when the temps were in the 20s.
__________________
Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:|Fast Intentions 3" TT-TDX|SpecialtyZ/Fast Intentions 72 Row Oil Cooler|SZ 6 Puck Clutch & Flywheel|3GsCustoms|Z1|Wavetrac|Hotchkis|Whiteline |Blitz|Fortune Auto 500|Fujimura|SPL|H&R|TK|TWM|RPM Rollbar|Sparco|Next Level Performance|TrackSpec|AeroFlow Dynamics|Pioneer|
|