RotaryArt 13b half block kit: for Mazda RX7 comprising:
Genuine Mazda coolant seals 4 inner and 4 outer square
Dowell O rings 4 total
Front cover O ring 1 total
Oil filter base O rings 2 total
18 total thrubolt O rings
Rear stationary gear O ring 1 total

RotaryArt 13b full block kit: for Mazda RX7 comprising:
Genuine Mazda coolant seals 4 inner and 4 outer square
Dowell O rings 4 total
Front cover O ring 1 total
Oil filter base O rings 2 total
18 total thrubolt O rings
Rear stationary gear O ring 1 total
Oil control O rings 4 inner
Oil control O rings 4 outer