Looking at the GMRS15 there is no difference, for a standard 1500 versus the trail boss, so I fail to see the 1" spacer? Even the instructions are generic for all 1500 4x4s. Is the 1" spacer there for the standard models too, and if so, how does that make sense? I'm wanting to purchase these but also want them to be effective and fit properly.
Great question. 9 times out of 10 anyone without the Trail Boss or AT4 won't need the included 1 inch spacer. However, because those trim levels come with a lift from the factory we've included that 1 inch spacer so you can take full advantage of the Timbren SES kit regardless of trim level. Simply add it in if you need it.
