[Johnnycast]

Hello everyone, I have a 2023 330i, and I am looking into different exhaust setups. I recently saw a 330i with a resonator/opf delete, and I like the sound of it. My question is: will the opf delete void my warranty and/or throw codes? I have already spoken to a bmw technician about the resonator delete, but now I am realizing that the resonator and OPF are connected, so I would probably have to take both out. I definitely want to avoid having any issues with the engine or with the warranty, and I definitely do not want CEL or limp mode. Please let me know, and save me from some possible issues 😅

[helmet91]

OPF?

Pretty sure that's only on ROW-spec B48s?

You have a US-spec 330i, yes? You'd have a B46 without OPF.

[Johnnycast]

Originally Posted by helmet91

OPF?

Pretty sure that's only on ROW-spec B48s?

You have a US-spec 330i, yes? You'd have a B46 without OPF.

Wait, my car doesn’t even have a b48??? I had no idea! I swear I saw videos from the US where the resonator was half resonator and half opf. Thanks for the info

[helmet91]

https://www.bimmerworld.com/About-Us...U-Differences/

Thanks to California, the entire US has been blessed with the SULEV B46. The rest of the world gets the beefed up B48, albeit with an OPF.

[Alpine430i]

Anyone try hollowing the opf? Are there any draw backs or have to make supporting mods?

[MaximK]

G20 LCI 330I with small tweaks on Sport+

[helmet91]

Originally Posted by Alpine430i

Anyone try hollowing the opf? Are there any draw backs or have to make supporting mods?

Pretty sure you don't have an OPF... US-spec 430i should be the B46 which is not equipped with the filter.