Originally Posted by PURE STI
The midpipe is 75mm for the 15+, it's the 11-14 that is 65mm. Don't want anyone to get the wrong idea. The 15+ HKS Legamax and STM also fits the 11-14 so the one HKS shows for the 11-14 which is 65mmm isn't needed.
Legamax Premium 31021-BF001 used for 11-19 STI Sedan using 75mm primary/midpipe.
Super Turbo Muffler 31029-AF013 used for 11-19 STI sedan using 75mm primary/midpipe.
Oops. Sorry about that. Thanks for clarifying that. I would just stay in the GR section where I belong
except everything except the 15+ forums is pretty much dead.