The ballpark figure is $3500 for the Kooks 1-7/8-inch headers, Kooks Green Catted H-pipe, installation and tuning. I had other work performed (see above) which is not included in the ballpark price, so tuning was not broken out separately but was part of the "custom" dyno tuning performed on Tasca's in-house Dynojet and was included in the ballpark price. Header installation is very labor intensive and this price was all encompassing. I had zero desire to install the headers myself, and of course this price includes full warranty from Tasca for the parts and work they performed. If there is ever a problem, I'll call Tasca and they'll take care of it, which is service I'm willing to pay for.