Compatible with 98-02 Camaro/Firebird F-Body. For 97-03 C5 Corvette. For 99-03 Silverado/Sierra GM Trucks (4.8L, 5.3L, 6.0L).
Centerless ground and heat treated before thread rolling, are designed to maximize reliability and strength, with nominally rated 220K psi tensile strength.
Made of iron with good ductility with black oxide finish, high temperature resistance
Easy to install, direct replace the old rusted bolts, improve car performance
Package include20* M11 Head Studs; 10* M8 Studs; 30* Parallel-ground Washers; 30* 12-point Nuts.(If you find any stud missing ,please send us mail by our store home page for help !)