Hi guys, have a question about catalytic converters. Shops here in dallas want anywhere from 480-600 to replace my stock cats with just your basic universal catalytic converters in my 99 tahoe. I have hunted and found some full replacements from the heads to the place where it connects to the rest of the exhaust anywhere from 200-350$. Should I just have it done and save myself the headache or buy these to save some coin and figure it out myself. I'm pretty handy and have a garage full of tools. Which way would yall go? Thanks!