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Visit us @ LCEperformance.com Header Stud Set - 20R/22R/22RE/2RZ/3RZ The factory exhaust manifold studs have a shoulder in the center that can interfere with proper header tightening. For better holding strength, our 10mm x 1.25 x 48mm long, heat treated plated header mounting studs are stronger than stock. Includes: eight studs, eight mechanical locking flange nuts. The short side of the stud will go into the head. Torque on the nut is 33 Ft. lbs. Contact our Tech Support Line for further information at (928) 855-6341