20B/Cosmos Side Housings



Mazda rotary engine side housings.
We also offer many services related to reliability and performance upgrades that will relate to the side housings. Please see a list with links below to detailed descriptions of all our side housing services.

Lapping Services

Ceramic/Cermet Coating


If you wish to add any of these services to your side housing order, please check out Modifications section of the store, or use the linked products below.

Additional information


20B Factory Center, 13B RE Cosmos Side Housings (set of 3)