• Prevent intake manifold leaks with quality fasteners
• Application: Chevy 265-400 cid, factory OEM
• Black oxide finished chrome moly
• 12-point head
• Precision machined for optimum thread engagement
• Rated at 170,000 psi - much stronger than Grade 8 hardware
• Wide underhead flange & companion washers provide even load distribution
• Precision rolled threads prevent galling with more consistent torque loading
• Optimum sealing of gasket surfaces