I also have a HTT turbo on my truck. They are a great company and they can help you on the correct turbo for your needs. I run the 62/65/13ss, the spool up is same as stock even with my chips turned off. The truck pulls alot harder than the stock turbo. My max EGT only droped about 100-150, but over all I am happy with the turbo. I do not tow with my truck and could of went with a lager turbo.