Borla Corvette Exhaust Systems The performance advantages of a Borla Corvette Exhaust System are widely recognized. The top engine builders in the racing world rely on Corvette Parts form Borla for maximum performance. Borla Corvette Exhaust is built of aircraft-quality austenitic stainless steel - stainless inside and out, not mild steel, not aluminum or coated aluminum. Borla engineers and manufacture all of it's exhaust products in the USA of aircraft-quality T-304 stainless steel and backs their street exhaust with a Million-Mile Warranty. Capture that "classic muscle car" sound with a Borla Exhaust for your Corvette.