The difference in CAI

[Leo2005]

I'd like to know if anybody have info on injen SP1963 and SP1968 for 07 sentra se-r and spec-v. What is the difference between those 2 cai? I don't see why sp1968 can not be installed in regular se-r when it says only for manual. The only info I found that they have filters 2.75" and 3.00". Sorry if this already been explained earlier but I couldn't find a thread. Thank you for any info.

[nametakennow]

You'd have to contact them directly for a complete answer, but I suspect that their engineering wing determined that the smaller filter (and whatever other changes there might be) worked better with the CVT, while the larger worked better with the manual.

[ABNRML4U]

Yeah, Dude Is like apples to Oranges.