HDR 63-74 CORVETTE 265-400

Flowtech headers are engineered for performance and value, featuring precision mandrel-bent tubing, formed collectors, and 5/16" flanges with sealing rings for a leak-free seal. They include all mounting hardware and gaskets for easy installation and are coated in a high heat-resistant black paint. Flowtech, founded in 1994, is known for aggressive product names and innovations like slotted port flanges for easier installation, dimpled tubes for header bolt clearance, and parallel-ground flanges for a tight seal. Their Afterburner headers improve scavenging with velocity tubes separating odd-firing cylinders, and their patented Warlock bypass muffler won a SEMA award in 1996. After becoming part of Holley Performance Products in 1999, Flowtech continued to focus on value for late-model cars and trucks, including Mustangs, Camaros, and full-size trucks.