What's HERE: Biltwell's Builder Exhaust Kit is exactly what its name implies: a selection of pre-fabbed tubing, header flanges and exhaust tips that puts the art of custom exhaust building in the hands of backyard fabricators. Each Builder Exhaust Kit includes the following:

- Four 16-inch-long (350mm) straight sections
- Two 3.5-inch radius (90mm) U-bends with straights
- Two 5-inch radius (134mm) U-bends with straights
- Two Evolution flanges
- Two Shovelhead flanges
- Two Ironhead flanges
- Two STD flanges
- Two fishtail tips

SURFACE FINISH: All raw tube sections are pre-polished to make chroming after joint finishing easier.