Sale

Engines and Components› Engines, Blocks and Components

MazdaTrix

13B REW Cosmo Center Housing / 20B 3-Rotor #3 Side Housing

$7,450.00 $6,995.00 Save $455.00

SKU: N3H1-10-D50Y-01

In Stock
In Stock
Ships by Jul 31
Free Shipping over $100
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

The MazdaTrix center housing is a cast iron component specifically manufactured for 13B REW Cosmo engines. It is also compatible as the #3 side housing for 3-rotor 20B engines. This is a new, Genuine Mazda OEM part. When utilizing this housing in a 20B configuration, please be aware that the four mounting holes are drilled for 10mm bolts or studs. If your specific 20B application requires larger 12mm bolts or studs, these holes will need to be re-drilled to accommodate them. This part is listed as discontinued by the manufacturer.

MIA's Description

The MazdaTrix center housing is a cast iron component designed for 13B REW Cosmo engines. It also serves as the #3 side housing for 3-rotor 20B engines. This housing features 10mm holes, which may require modification for larger 12mm bolts or studs if used in a 20B application.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMazdaTrix
Part NumberN3H1-10-D50Y-01
CategoryEngines and Components

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy