Closed Box with Scoop (350603, 3506063) 2001-2007c Silverado/Sierra 2500/3500HD 6.0L V8

Could be much better

Looks great, fitment for such an expensive product could be much better. I had to drill out one of the holes in order for the maf to mount to the side of the air box. Then when I went to install the air box in the engine bay I could only get one mounting bolt to line up to be able to secure it. For such an expensive intake I was hoping for something that fit much better and didn't require modification. In order to get the intake box to fit I would need to drill another hole into the bottom.

Volant

The item seems to be great so far I haven't noticed an increase in fuel mileage but I think a decrease in mileage. Overall appearance is great easy to install. I think a couple more screws in the top plate for the filter would be better. No sound differences

Enhanced breathing

This product is installed on an '02 CC 2500HD 6.0 with a performance free flowing exhaust. Now the problem with a free flowing exhaust is it can expel the gasses but the engine is like an Olympic runner running a race breathing through a straw, it's very restrictive and this product just opened up the intake of air so it can run better. Coupled with the lower air scoop to ram air into the air box providing a positive pressure so it's not ******* air at atmospheric pressure but rather cold air pushed into the engine. If you see how the other "cold air" systems work the air box isn't closed in so it's not a true cold air design, it still draws under hood heat from the engine bay.

Terrible

It’s been 3 weeks

Bad customer service Multiple parts didn’t fit Missing screws. I ended up reaming out the throttle body tube and making it fit. Bought some extra bolts. It’s nice at this point just harder than and intake should be