T bolt for header flange and exhaust pipe are perfect for putting your exhaust manifold or header flange bolts in those hard to reach places. Simply place these easy to install bolts in the exhaust flange on your headers, manifolds or exhaust and let the "T" do the work holding it in place. Thread is 3/8-16. Measures 3-1/2" long (2" of which is threaded) T bolt for header flange and exhaust pipes, grade 8. Can be fitted if needed. Check installation to ensure it will stay secure. Head can be ground or cut smaller as desired or IF needed.