As long as the CAI is the one for the LLY Duramax, you are fine with mating it to an LBZ inletI have an aFe stage 2 CAI and i am going to get the LBZ mouthpiece but can i run the mouthpiece and the CAI i already have or will it be to much air? because id hate to have a useless CAI because it wasn't cheap lol thanks for any help!
It will run just fine. You will just have to cut the pipe from the air filter off where it goes to the longer mouthpiece to make it fit. You may need a new coupler depending on the size of your cold air intake tube where you cut it. The MAF sensor is normally located near the air filter and only needs to be recalibrated if the diameter of the tube where it is mounted is changed. This is the case if you change to a 2006 stock or aftermarket air intake.yea its on there now its for the LLY and i know you have to modify the tube because the LBZ mouthpiece comes farther up then the LLY mouthpiece but i wasnt sure if with both of them i would take in to much air will i need to get anything done to the MAF sensor or will it run fine?
Camdoc...can you repost the graph if you still have it? I guess something has happened along the way and I can't see it.Hi everyone, I thought you might be interested in some flowbench data for the LBZ mouthpiece modification for the LLY engine. I was bored yesterday so I ran a few bits across my flowbench.
This modification is the best thing you can do for an LLY! There is no point in buying a CAI with the stock mouthpiece, it is a terrible restriction. I was also suprised that an air filter with less than 17,000 miles was showing restriction.
The chart shows the flow through the mouthpieces only, then the LLY mouthpiece with only the stock duct, then the entire stock LLY system with a used air filter, then a new air filter. The last column is the LLY / LBZ hybrid complete induction system with a clean air filter.
My bench would only pull 21 In-H2O with the LLY / LBZ hybrid induction system, if you look at the orange columns you can see the benefit of this modification. The entire hybrid system with a filter flows more air than the LLY mouthpiece alone by a large amount.
Thanks for a great website, I took your advice and did this modification, it is the best bang for the buck for any LLY owner!