Just wanted to add that these fit 4wd 88-98 GMT400 with ls swaps, you have to trim an 1" off the front of the trans cross-member (only took about 15 min). Since you have to slide it back anyways to get the y pipe in it wasn't a big deal to pop it out and cut a chunk out. Other than that they fit really nice, o2 sensor locations don't interfere with anything. Thanks for an excellent product!

 

Has anyone installed the updated ypipe on a 4l80e swapped truck yet? Would like to see some pictures of the ypipe with the 80e before i order. Also does the crossover hang down below the trans and crossmember like the stock ypipe? Mines pretty dented from rubbing on speed bumps and stuff, would be nice if it as raised 3/4"-1" higher top avoid that.
Theyd be going on my 06 Sierra crew cab 5.3/4l80e.

 

I'd love to see some pictures of those headers installed. I have a 2000 K2500 OBS Silverado with an LQ9 swap and am looking for a set of stainless headers since I'm re-doing my exhaust.

 

Will the 07-13 fit on the 2001 silverado