Chevy LS intake gaskets 4.8, 5.3, 6.0 Fel Pro vs MAHLE

I had a lean bank two code. Shop adviced me to just change the intake gaskets. Yet I changed then two years ago. Said would be cheaper to start thier vs bringing it in. The MAHLE gaskets weren't bad as I smoke tested the intake, sprayed with water, carb cleaner ect. But changed it anyways. Turns out it was bank two fuel injectors were clogged. Wish I didn't buy thr Fel-Pro as also recalled the internet forums saying they stunk. So far 5 weeks no issues. Anyways I also hinted here at how you can save money using Advanced online. Buy online and pickup in store deal. Google Advanced Auto discount codes always lots of them thier. I really haven't seen any at AutoZone or Oriely's. Make sure and double check the store it has listed at the top to pickup parts !!!! Sometimes it guesses the closest one. It messed me up twice Hope this helps.