PN Racing Mini-Z Buggy Stainless Steel Center Coupler with 7075 Alm Pinion

Doesn't appear lighter than the Kyosho equivalent but the stronger pinion is worthwhile - so far, so good. The allen key that comes in the packet is pretty soft and stripped itself with almost no force applied - be gentle.

Works great. Strong, lught weight, and never in the need of changing pinions again!