Turbo manifold nuts backing out on you, causing exhaust leaks?!
M8x1.25 is the size you need for SR20, KA24DE, and etc.
Stage 8 Locking Turbo Kits easy to use and they are real assurance against horsepower loss or gasket failure created by loose nuts or bolts. The unique patented and trademarked functional design is just three pieces: a bolt (4130 Alloy Steel), a locking retainer and a spring clip or, depending on the application, a nut, a locking retainer and a spring clip. The turbo bolt kits are application specific as either metric hex head 6 point or metric nut. All Stage 8 Locking Turbo Kits are sold with all of the necessary hardware for your application.
(4) 8mm-1.25x25mm 6pt DHH
With 7/16 Head Stainless Steel Hardware