Installed Helix 2 in my truck over the weekend, what a difference it made. Smoother idle, engine is noticeably quieter at idle, stronger bottom end power, turbo spool up is much faster, less low rpm smoke, have not checked cruise egts yet but I suspect that they will be lower also. Cam has done everthing it was advertised to do, I love it. Thank you Tim at TRE Diesel Performance, and thank you Don M for such a good product.