Adapter plate kits to suit Ford c4/c10 automated gear box to Mazda rotary to 13B engine. These plates will fit a Mazda RX7 automated jatco bellhousing, early s2 or afterwards collection four/five design. Spark plug holes threads are cleaned and retapped. OMP injector holes are drilled to eliminate clogged carbon. https://travisdpfbm.azzablog.com/31630137/the-basic-principles-of-13b-renesis-engine-for-sale