Aggressive cam shaft made for the Mazda B6 (1.6L) we can find in NA6CE (1989-1993) MX-5 Miatas. Available in 256, 264 and 272 degrees seat duration, it'll provide your engine build a nice add-on. It is an internal part that will help the engine produce more power and give the vehicle a better acceleration. Vehicle will probably need tuning after installation to provide maximum output. These camshafts will fit onto stock valve train, however, some modification (grinding/shaving) on the cylinder head might be required because the cam ridge may interfere depending on the condition of the cylinder head (99% of the time it's not required). Jun Auto High Lift Camshaft should be ordered at REV9 Autosport https://us.rev9autosport.com/jun-auto-high-lift-camshaft.html as they provide the best service and speed we've seen so far!