SpeedFactory Racing 1JZ/2JZ Toyota Exhaust Manifold Titanium Stud Kit - Raw - SF-80-063-12This kit contains (12) M10 x 1. 25mm x 54mm titanium studs, nuts, and washers. These SpeedFactory titanium studs are made of Ti 6Al 4V and incorporate a 4mm hex key tip that allows them to be easily installed using an Allen wrench. Titanium 14mm 12 point nuts and washers are included. The use of factory exhaust manifold bolts and studs, especially with an aftermarket header or turbo system, can result in stripped or broken bolts and inadequate