whats the loudest (deep tone) exhaust out there for a 1.8t

Dont go for a brand. Just go to a shop and tell them what you want and have something custom made. It will cost half of what a manafautured exhaust will cost.

They will bend all the pips for you and make something to your liking

Youtube!!! If you dont wanna pay a lot of $$$ go custom.

where exactly are you located? If you're in CA I can reccomend a few shop for you.

Back in the days when I had my caugh caugh... widebody honda I got all the piping and stuff done at RPMS in San Diego (Where I Live) and Richard charged me I think like $400 for everything. Kits online that sounded the same ran for over a grand. I said it once and ill say it again, GO CUSTOM!! haah pic enclosed of my honda.... hahaa