The exhaust is Wilkinson's Pantera GTS headers and mufflers in stainless. He offers them with the tips straight or tilted up. I bought the straight tips earlier this year. Fortunately, Steve has a process where he can tilt up the straight tips and we did that with mine. On a previous Pantera, I tilted them up myself by partially cutting the tips with an angle grinder, bending them up, and then a muffler shop welded them. However, Wilkinson process is much better than what I did (the tips are bent but not cut) but he is only setup to do this on his tailpipes.
Regarding cost, I did as much work as possible myself. My painter did the bodywork at my place for $750. This included welding with my welder. I got the bumpers from Wilkinson. The fronts are NOS (new, old stock) and the rears are nicely done replicas. Please check with Steve for pricing.