Before I buy a lid, I wanted to know if I bought it for my stock MAF and decided to get an 85 mm MAF later would it still work or would I have to get a new lid? TSP sells a lid FOR (not with) a 85mm MAF sensor for $10 more than the regular one.

 

The 85mm MAF's comes with an adaptor to fit the smaller lids. You can get a smaller lid and upgrade to the maf later. The 85mm kit is for people who know they want both at the same time. Thats what I got and it is a very nice kit for a decent price.