ACL 90-05 Miata Main Bearings

ACL Race Series
Main Bearing, Set
Mazda  B6 , B6-T, BP, BP-T, ZL-VE, ZM-DE, 1.6, 1.8
90-05 Miata MX5 All

These are the bearings used in all of our championship winning race engines

Order 1 (one) per car.

ENGINE BEARINGS
	CON ROD BEARING SET		MAIN BEARING SET
	Part#		Part#
	4B8351H	4B8351HX	5M8353H	5M8353HX
Sizes	STD,.025, .25, .50	STD	STD,.025, .25, .50	STD
Oil Clearance	Standard	+ 0.001″ Extra	Standard	+ 0.001″ Extra
Half Type	Upper & Lower		Upper & Lower
Material	Tri-metal Hardened steel backs				Min Std Shaft Size	1.7693″ / 44.940mm		1.9661″ / 49.938mm
Max Std Shaft Size	1.7699″ / 44.956mm		1.9668″ / 49.956mm
Min Std Tunnel Size	1.8896″ / 47.996mm		2.1259″ / 53.998mm
Max Std Tunnel Size	1.8904″ / 48.016mm		2.1267″ / 54.018mm
Max Wall at Crown	0.0596″ / 1.515mm	0.0591″ / 1.502mm	0.0793″ / 2.013mm	0.0787″ / 2.000mm
Max Overall Length	0.669″ / 17.00mm		0.6941″ / 17.63mm
Notes
Diagram (Top View)