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I can take different readings tomorrow but it has to wait until I replace the fitting for my heater core since it broke this morning.
What exactly are you saying? That the tube needs to “ neck down” where the MAF is located? The factory location is directly where the tube connects to the filter housing, it’s widest point. Also the tube included with my Whipple supercharger has the same configuration. It’s pretty much in line with the design of the Spectre. And plenty of people have been running the Spectre and cheap copies of their design without any issues.
im not sure on the reasoning behind it im at a complete loss with anything tune related. anyway its a known possibility since like 05 i want to say. its not all vehicles gm or not however its a possibility. its why some cai have a spot on the intake tube that's like the spots ive circled in the pictures posted prior. others actually have a choke in the kit that's removable incase you actually want to get tuned and get the most benefit from a cai. ive run spectre before and haven't had an issue however that particular vehicle doesn't care. could mount the maf right to the tb and leave it wide open and it wouldn't mind. regardless majority of people just do bolt ons and leave it as is so some cai companies build that choke into the intake tube so there's less chance the factory tune will see a problem with said aftermarket part. off hand vehicles ive personally dealt with this problem was an 07 cobalt and a 08 civic. ends with the same issue of the engine runs but ends up with a cel due to being lean. i looked up the op's year make and model and alot of the cai have the visible choke on the pipe which indicates enough to me a lean code is a potential without it. also as your running a supercharger your obviously tuned. the maf isn't a problem with the cai the factory tune is the problem.
