C15 Acert MXS/NXS IVA/VVA Off Pack

All are worth trying for someone wanting to find a file that works for your situation. Can be used with single turbos or keep the twins. Watch your exhaust temps either way. Some files keep the ivas plugged in and are what are called sleep files, some are iva unplugged.

525hp works perfect with a single turbo, the 560 works great either single or twins, the 575 works great with either single or twin and gets great mpg, and the 700 is for twin turbos only.

Step by step instructions included

Also wash file and a file to restore timing to early 3406e models which helps with responsiveness, mpg and temps.

so everything going safely with clear instructions with specific flash files to get your job done