My '18 6.2 has a 5.3 intake box

[SILVER SLED]

I have a few intake box inserts laying around, that's what I'm calling the piece that has the opening that rests against the fender and has the foam insulation around it.  Well on a 5.3 and a 6.2 that part has a large air horned opening, but the 6.2 piece in addition also has or had)  a smaller oval portion that is opened up to seemingly let more air in.  So I have a couple of these inserts laying around and I decided to open one way up by cutting everything out of the insert so it's two big holes instead of one small and one big one, bigger than a stock 6.2 has/had.  So I did and went to put it in my truck and found that the insert in my truck did not have the second small oval opening.  So I put the big opening insert in.  I realized that alone won't do anything because the box is formed to the two stock 6.2 openings.  So I have an extra stock intake box and opened that up the size I opened up the insert to.  I also replaced the stock filter with a green filter. Took it for a quick ride and it's definitely louder now.  I had just the MIT intake tube before. 

 

Moral of the story, is why did my 6.2 have a 5.3 intake box portion.  Anybody else notice this. 

[DeePa]

Same reason why 17+ gmc gets the blue lit gauge clusters and dash lights rather than red....using up in stock parts before  the model year switch over IMO

[L86 All Terrain]

Do you have any photos? My intake is in the entrance room to my house, I would like to compare if possible. I put in an AFE intake, I was amazed at the dead space, baffles, and just how poorly flowing the factory design is. Although I am sure it is designed that way to silence the intake noise. The 6.2L has a larger throttle body which makes me believe they wouldn't use a 5.3L air box. Unless they used a 5.3L box with a 6.2L connection boot. Most aftermarket intake kits come with a silicone reducer boot for 5.3L's smaller throttle body and a straight flow through design boot for the 6.2L.  

[SILVER SLED]

On ‎7‎/‎31‎/‎2018 at 11:48 AM, 10SierraA.T. said:

Do you have any photos? My intake is in the entrance room to my house, I would like to compare if possible. I put in an AFE intake, I was amazed at the dead space, baffles, and just how poorly flowing the factory design is. Although I am sure it is designed that way to silence the intake noise. The 6.2L has a larger throttle body which makes me believe they wouldn't use a 5.3L air box. Unless they used a 5.3L box with a 6.2L connection boot. Most aftermarket intake kits come with a silicone reducer boot for 5.3L's smaller throttle body and a straight flow through design boot for the 6.2L.  

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