Kameari R180/R200 reinforced side flange

R180 reinforced side flange
This is a bolt-on side flange that allows you to install Subaru's easily available R180 differential on S30 and GC10 . Unlike the Nissan R180 's bolt type (hollow spline), it is a circlip type, so the inside of the spline can be made solid, increasing strength. Furthermore, the spline diameter is 2 mm thicker and is made of high strength nickel chromium molybdenum steel, making it twice as strong as the genuine product

R200 reinforced side flange
Replacing the differential from R180 to R200 as the engine increases in power is a standard practice for tuning cars.
What you will definitely need in that case is this side flange. In response to the discontinuation of production of Nissan genuine side flanges, we reviewed them as reinforced parts and made design changes.
Nickel chromium molybdenum steel is used as the material to withstand shock and twisting caused by sudden clutch engagement and upshifts.
Furthermore, we have achieved a significant increase in strength by passing strict inspection standards for heat treatment management, hardness depth, and processing accuracy.

For more details and price compatibility, please go through the below link
Kameari R180/R200 reinforced side flange