Hey Virgil,
I fabbed the kit myself. I went to school for 2 1/2 years in fabrication/welding. There 100% tig welded. The mainfolds are 10 ga stainless steel. They have never cracked and are really thick so they really keep the heat in. The turbos have under 10k miles on them. There in great shape. The Turbos are turbonetics T4 62-1 with P-trim wheels . The wastegates are 38mm Tials. The turbos alone cost me $1,100 each! The wastegates come with 8 lb springs so if you want to run more boost you will need to buy a boost controller. Maybe this cleared up some of the questions you had.
Let me know if you have anymore....
Thanks
Justin