That's about the worst description I have ever made. Maybe a picture would help 
SLP Lid Fitment
SLP Lid Fitment For those who have installed it. Did the front top lip of the lid slide inside of the front bottom of the lid (in between the metal clips)? that was only way I could get a decent fit.
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From: Tomball/Nacogdoches TX
Yes, the SLP lid does seem to have a slight underbite when correctly installed. You will either need a smooth bellows or fernco mod to hold the lid tightly sealed on the rear tabs. If you use the stock "accordian" bellows the tabs in the back will frequently come out of correct, sealed position with aggressive shifting. Just close the lid normally, then gently apply pressure from the top to glide the tabs on the back of the lid into the spaces they are supposed to fit into on the rear. Keep the lid closed and slide it back just a little further and you will see it develope the slight underbite appearance, then lock with the front metal tabs. Your lid will seal and fit very tight after that.
Launching!
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From: Indianapolis, IN
Comin' Thunder wrote: Yes, the SLP lid does seem to have a slight underbite when correctly installed. You will either need a smooth bellows or fernco mod to hold the lid tightly sealed on the rear tabs. If you use the stock "accordian" bellows the tabs in the back will frequently come out of correct, sealed position with aggressive shifting. Just close the lid normally, then gently apply pressure from the top to glide the tabs on the back of the lid into the spaces they are supposed to fit into on the rear. Keep the lid closed and slide it back just a little further and you will see it develope the slight underbite appearance, then lock with the front metal tabs. Your lid will seal and fit very tight after that.
. Not sure how the stock accordian bellows would be causing the tabs to come out... I would think the aftermarket smooth bellows would do this more so than the stock bellows.The lid and rear tabs should be stiff enough to provide an adequate seal against the air filter.
Staging Lane
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Yes to your question. The lid pushes back so that the leading edge of the lid is behind the leading edge of the air box.
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From: Tree-Hugging, Bug eating CALI'
I've never had a real problem with fitment on my lid (SLP.) It sounds like it slips in like yours. I have noticed that the bottom of the throat (where the bellows connects) contacts the upper radiator mount (lower airbox.) It seems that if this clearnace was much different it might force the back of air lid up off the filter so watch out for this. It may be worth just going with a Delco or Fram filter; they have thicker foam frames and they seem to seal the lids a lot tighter..
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