DURAMAX L5P ALASKAN Cold Start/ High idle 

silverado 15 yes I have the wc fab turbo horn and resonator delete in it as of now. & im parked at a beach parking lot at the end

@@xlandscaper thanks for the info subbing your channel big duramax fan

silverado 15 awesome!! Thanks for the sub. Lots of work getting done on the truck shortly, stay tuned

EvoDmaxs no tuning is required for just the intake horn installation but to answer your question, yes, it’s fully tuned & deleted

Xlandscaper I’m thinking on doing the intake horn on my 2020 2500HD duramax but some say it requires tino other don’t so it’s making hard to pull the trigger lol

EvoDmaxs I can assure you there is no tuning required for just the intake horn

A downpipe like the one you have required tuning do to disabling the sensors on it correct? What kinda sensors are those on catalytic behind turbo

EvoDmaxs yes. Once you remove the down pipe and add an aftermarket exhaust there are quite a few plugs and sensors that will need to be disconnected and yes you will then require tuning