bought a 2017 kw w900l

[Waterloo]

The only block, would be in the EGR cooler, the exhaust side, a stainless steel plug. If you do not have the proper SS plug, leave it alone. The EGR stays intact, and is closed permanently via the ECM. The motor stays intact, this is all done through software. Of course, hollow out the cans... Most outfits doing this work do everything opposite... Pull systems, plate, block and then turn around and butcher the ECM and never touch the cans... In short time, you have a cooked motor... And most guys will go right back to the same well that destroyed their truck for a fix... Stupid is a funny thing... ;-)