BBK GM LS1 4.8 5.3 5.7 6.0 6.2 Exhaust Header Gasket SetAll 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. This Part Fits: Year Make Model Submodel 2001 2004