I've been shopping around getting quotes on header/exhaust install and the variance in quotes has been surprising. One shop quoted $500 (initial) just for headers. A local (nationally renowned) performance shop quoted me over $2k for full exhaust install (I thought that was pretty steep). I'm probably capable of doing it over a weekend on jacks but looking to avoid that headache (especially for headers on a 12-year old vehicle). What is a reasonable expectation to pay for header install? Exhaust in question is full SS Dynatech.