BBK Exhaust Collector Stud And Bolt Kit For BBK Exhaust CollectorsAll BBK Performance parts are backed by a 1 YEAR manufacturers warranty from the original date of purchase. An optional extended warranty is also available giving you an additional 2 or 3 years from original date of purchase. Costs for the extended warranty option can be viewed when the item is added to your cart. The manufacturers warranty is based on normal use and installation of each product. Hardened M12 1. 75 x 65mm OAL Plus 1 2 inch washers and