Experiencing low end power loss after exhaust install on my 2016 Rebel. This is my 3rd ram 1500 very familiar with the 5.7 and the trucks in general. Before the exhaust my truck had no problem roasting the tires from a start. Now after the exhaust install it can barely spin them at all!! Exhaust manufacturer tech says he's never heard of this problem. I should have filmed a burnout before for proof. Any suggestions would be appreciated.