Some people have had back luck with the Dorman elbows and say the GM ones are better. If the new ones leak again I might check into the GM ones.
Make sure you lube the o-rings and double duty would be to put a bead of gray not copper RTV around the the plastic part of the elbow before you install it.
See these only failed because I had the heat gun to close to them trying to heatshrink around that vacuum fitting I was having an issue with. So pretty much Im a dumbass
1998 GS with Open cone, PLOG, ZZP Catless DP, tune & Intense MPS 3.6. Pulls good enough to make the woman smack me and call me a D!*k.