I ordered th 1 7/8" headers and y-pipe. They both fit without modification or damaging them. The shipping could not have been faster. I ordered Friday afternoon and received my order at noon on Sunday!...most excellent. My only complaint is that the website said the x-pipe was unavailable with the headers. I later found that the x-pipe was available to purchase as a stand alone item. That is what I wanted. Still good product that fit my truck.
Had them installed 2 years ago. no problems, really woke up the truck and made it fun.
installed on my 2009 silverado LT to replace a set of pacesetters that had a primary crack. super easy fit. honestly has more clearance from the frame at points then the pacesetters did. O2 locations were perfect and had no interference with the floor.
Wasn't difficult to put on and everything bolt right on no problems sounds fn amazing and looks good too hidden even on a lifted yukon can't see it underneath awesome
Great product and great outcome on sound and performance. Wasn't tickled about the 02 sensor boss angle on drivers side header (had to use a shorter 02 sensor to prevent cab contact).
                      












