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Yeah, the fitment to the stock intake hose and the filter they provided was really good, and I was almost done with the install until I tried to put the MAF in. Cue me having to undo all of it to get the stock air box back on, haha. I'm glad it worked for you though!

Awesome, thanks!

Yeah, I hope so too! I don't have any calipers myself, thought I did try to show the difference to them with a tape measure. I'll have to wait for their response though.

Yeah, I knew they only make the non-race/factory calibration for the Si, after reading through this thread I figured it seemed like it would be a good option with the stock tune. Especially since I don't have a way to tune right now, haha. That's why I was attempting to talk to their customer...

Hey, it seems like I have a similar problem to other users, I bought the non-race version for the Si to go onto my 2019 Si sedan. But when installing it, my MAF will definitely not fit in the hole. I was wondering if anyone with the non-race Si MAF housing and the non-race 1.5T MAF housing could...