A: Alphawerks' JDM equal length stainless steel headers USDM 350Z. The headers are imported and tested by Nexus Industry. To assure power in any environment the Alphawerks headers were dyno tested in one of the hottest dyno facility's stateside, in Homestead, FL. Temperatures during the dyno session hit 98 degrees Farenheit during testing. Alphawerks 3-into-1 equal length stainless-steel header features thick CNC-machined stainless-steel flanges to give the system a tight, leak-free seal. Nexus Industry, the company that imports the Alphawerks line, tested the clearance of the JDM application to insure 100% fitment on the USDM 350Z. For the more hardcore enthusiast, Alphawerks also has race-only test-pipe applications for the 350Z. These test pipes are specifically designed to work with their headers to squeeze every last drop of horsepower and torque from the VQ35DE. To see the dyno plot on the headers, go to www.nexusindustry.com, the exclusive North American distributors of Alphawerks, or call them toll-free at 1-877-86-NEXUS.