LS Head Stud Upgrade Kit # K003-H21E
If you're looking to enhance the head stud clamping force for your boosted LS 4 bolt block, look no further than our K003-H21E 1/2" stud upgrade kit. This kit delivers an impressive 18,500 lbs-force of clamp load, significantly surpassing the 12,000 lbs-force offered by conventional M11x7/16 head stud kits (1/2" studs do require block machining). In stock and ready to ship!