Condition - USED
This is the quick change differential we used on our race team cars in Formula Drift until about 2015. Uses many same parts as a Winters, but the outer case is different dimensionally. Uses same quick change gears as Winters, and accepts same style Porsche axles. These units are wider vs Winters, so axles end up being shorter.
We use this same Speedway Engineering diff on our S13 demo car to this date.