Stock Exhaust diameter

[sammo84]

I have a 2017 silverado 1500 LT Crew Cab. I will be installing long tube headers and need to know what size diameter is the y pipe connector to the male ball socket diameter that connects to the expansion pipe in front of the muffler? My kit did not come with this.

[rlcole321]

I installed long tubes on my 2018 L83 (along with a DOD delete BTR cam system) and could not use my Y pipe, the angle and the spread was off, So I ended up cutting off the cat's and fab'ing up a 3", 2 into 1 exhaust using my original cat's. So you won't be able to use your original Y pipe.

[sammo84]

What company did you go with on your long tube headers

[rlcole321]

Speed Engineering