There are massive gains to be had by moving away from synchros due to their lack of ability to shift fast at high RPM, however dog boxes take a knack to drive, loathed by some and loved by others, if you want to go fast, give us a call and we'll change your life. In car of a PPG Gearbox Shifting 1-4th Helical Dog in a Z31 casing with wheelspin of drag radials at 220km/h.
More Info:- https://www.makemegofast.com.au/product-category/drivetrain/gearbox