I run a W57 gearbox in my KE70 race car behind a 20V turbo 7AGE motor,
and now that we are getting decent power out of it,
we have been having gearbox issues.

The car is a circuit race car only, and when run at full boost of 20psi,
we managed to break 3 W series boxes in a season, with two in two weekends,
until we reduced the boost and power to make them last.


Question for you all is other than PPG,
is there other people who make kits for the W series gearboxes to strengthen them?

Dont want to go to a R154 as they have there own issues, and are too heavy,
and clunky for what I want.

Would prefer not to go dogbox, but if that's the only option then I will look at it.

So anyone else have any idea's or know of some companies?