Had been running with TJW mod which is a must over stock but wanted more sound above 4k rpm where the TJW mod starts to sound like a sand blaster IMO. I found a used Milltek Sport and just had it installed tonight with my factory tips.

First impressions- sounds a bit deeper than TJW but nice! Fairly mellow until ~4k then starts to sing. Too much traffic tonight so plan to get out and run her a bit tomorrow, but WOW sounds fantastic!

Dyno-butt says more responsive, but also been travelling the past month.

Those on the fence- at least do the TJW mod then save up for a proper system, these cars can sound fantastic!