Made out of high quality 304 Stainless Steel these "shorty" headers are designed as a direct bolt-on to the factory exhaust system. BBK's "Speedware Series" Stainless Steel headers feature CNC mandrel-bent 1 5/8" 304 Stainless Steel tubing and 3.8" thick 304 stainless flanges. BBK's Stainless Steel headers include all the necessary gaskets, hardware, and detailed installation instructions for an easy install. Contact BBK at (951) 296-1771 www.bbkperformance.com