headers are so easy on a 5th gen. I am a private guy but will install near Richmond VA. Tune is up to you. I have installed a few sets so far and they fit great. What brand? I will put them on for half what you were quoted.
#917 A6. firstname.lastname@example.org 1.53 60' ATI/Lingenfelter balancer (10" ring), stock upper pulley, 90mm TB, ID850s,Rotofab/Lingenfelter intercooler reservoir, Cooler Logic HX, Lingenfelter idler relocation bracket, NGK TR7ix, 160 t-stat, Dewitts Radiator, Texas Speed 1 7/8" headers(no cats). M&H drag radials 325/45-17 & M&H 28x4.5" bias skinnies. Tuning by Frost at Performance Autosport in Richmond, VA (804) 358-2505