Hey there! Sounds like you're diving into some serious upgrades on your LBZ. I’ve been in a similar spot with my '07—after slapping a new turbo on, I quickly realized the stock Y-Bridge just couldn’t keep up with the airflow demands. You’ve probably already heard this, but when you push more air, especially under higher boost, that stock piece can really start to become a choke point.

I went through the same research rabbit hole, and after trying out a couple options, I settled on the GM Duramax LBZ/LMM - Upgraded Y-Bridge intake kit (2006-2010) . Not only did it hold up to the increased boost, but the installation was straightforward. It’s been rock solid, even under heavy towing with my 5th wheel.