anybody have experience with spintech?

[NAREJEPP]

I don't know. I've only had experience with the 9000.

but you say the 9000 doesn't pop or crackle throughout the entire rpm range? that was the biggest turn off for me with the flowmaster 10 series, which is why i never went that route. are you running any cats? i know mine popped quite a bit when i deleted the cats (still had the 40s on it) so i put them back on pretty quick.

i certainly don't mind going louder at all, in fact that's kinda what i am looking for, i just want to have it sound smooth still.