this guy is selin his 90mm 2001 airbox and just wondering if would do anything for my 99L?

i dont want to get a chip to calbirate it, still have 3 yrs left on my warranty and dont want to void it

 

If your truck is stock or close to it save your money.

 

Why bother unless you are at WOT throttle a lot.

I know the factory made that improvement but if your warranty won't allow it then don't do it.

personally I would think you have a little better throttle response and low end grunt with the smaller one.

 

I haven't got to drive but one time since switching to a 90mm, but the MAFv. seems awfully close to the same v. @ the same Gm/S airflow as it had with the 80mm. ??? (using Predator datalogger)
I would have thought it would have been quite a bit lower---which is why some websites say you need them-to keep from hitting the 5.0v. max.