replacement 12 bolt rear

[RocketBlock]

Originally Posted by Alan Roehrich

Most all of the companies that sell rear ends use the KTRE housing for their heavy duty 12 bolt stuff. The KTRE housing is great, because it is thick, and stiff, and you can get it with a 3.250 carrier bearing bore, so you can use an aluminum spool and 35 spline axles.

Then this is the aftermarket block of rear ends? Looking at the rulebook it says "same type from the automobile manufacturer"