Everything from the start has been custom on this Big Block Chevy Rock Crawler. So when it came time for exhaust, GPHeaders was the perfect choice. Our header mockup kit allowed for a cost effective way to trial fit a few different designs without wasting expensive mandrel bend in the process. Our headers are hand crafted from an American made 304 Stainless Steel using true Merge Collectors and are 100% purge TIG Welded.