[argonboy]

The diffuser looks great. I was actually thinking that I'm going to be screwing up my car's underbody air flow since the GruppeM exhaust will leave a gap where the stock exhaust filled that space.

The only contact they have on their site is the phone number from their Tokyo shop, I even tried to send emails to info & office at sunbeam-ex.jp but they don't have a mail server setup.

I'll try to call tomorrow, hopefully get some info. I'll also ask them for shipped quotes for US West & East coasts and I'll post those.