I have the "pants on fire" Sidewinders from Carpenter and Megaphone.   Sounds deeper, runes cooler, still some decel pops but much less.  Oh and it Rips.   NOTE I did the TPS adjustments to .65 and +.12 suggested in another tune and the idle smoothed  out such that I lowered it 100 rpm at operating temp. and it has a nice little lope.