Honda OEM MAINSHAFT RSX K20A2 K20Z1 Civic SI K20Z3 K-Series

OEM part for Honda application. This is the mainshaft oem for 6sp. It's a direct replacement part for K-Series Transmissions. 

Fitment:
Honda / Acura K-SERIES 
Civic SI 8th 2006-2011 RSX K20A2 2002-2004

Whether used on the Street, Strip or Track 
No-Hassle, Just works!