Features: 1.Applicable Models: Stainless steel cylinder head bolts is replacement for Chevy Big Block BBC 348, 396, 402, 409, 427, 454, 502 Engines, which is made according to the prototype model. 2.Stable Connection: Outstanding strength and mechanical properties to ensure that the intake tube and cylinder are properly and tightly connected without loosening, which ensures stability. 3.Stainless Steel: The kit is made of stainless steel with polished surface and high temperature resistance, which can be used for a long time without being damaged. 4.Upgraded Design: These bolt kits are precision machined and designed for mounting the intake pipe to the cylinder head, giving you an excellent use experience. 5.Professional Performance: Compact structure and a full range of quantities to meet your needs, perfect for enhancing driving performance. Specification: Item Type: Cylinder Head Bolt Kit_x000D_ Material: Hardened 304 stainless steel_x000D_ _x000D_ Surface: Polished_x000D_ Bolt Size: 3/8in x 1 1/4in hexagonal head bolt_x000D_ Gasket Size: 3/8in AN washer_x000D_ _x000D_ Accept 5/16in hexagonal wrench, hexagonal socket for installation_x000D_ _x000D_ Applicable Models:_x000D_ _x000D_ Replacement for Chevy Big Block BBC 348, 396, 402, 409, 427, 454, 502 Engines PackageList: 16 x Bolts 16 x Gasket