Ok first - the piping off the MAF to the air filter came off....only had it on for about 100-150 miles not sure when it came off but hopefully it didnt suck up too many nasties, usually not too much dust / debris around here.

Second
The PCM appears to be leaking a red fluid...cant be ATF havent messed with any yet to possibly get it in there..any thoughts?

Third - Plumbing / Wizair step up method
The way the kit steps up the size to the 4in is with 2 1/4in-ish sheets of rubber taped to make a ring and one goes over the other one. so it went from stock 75mm maf surface, inner rubber ring(slick rubber to MAF - grated / rough to outside) outer rubber ring slick on both sides.

I first just tried to re-install it the way it was. Once the hose clamp started to torque down it would slip the whole thing right off the MAF

As a temp fix i flipped the inner ring so the rough part was towards the MAF, Also made sure all the hose clamps bolt / tighteners were clear of the box incase maybe the motor moving back and forth in the stock mounts caused them to snag and pull it off.

Took it for a test drive after getting it re-installed and it was still on, but need to get around to doing it proper, like the air box, like the K&N...dont like the plumbing....