OEM or aftermarket bearings

[dreek93sr20]

Im building my SR and cant decide on wether to go with clevite/acl or just go back with oem main bearings. Im fully built with rods, pistons, head built, but before I go back together I would like to know are OEM main bearings cool to go back together with. Im looking around the 500hp range also. THANKS IN ADVANCE FOR THE HELP

[lucas240sx]

Oem should be find
Just make sure you get the right sizes

I went with acl standard size bcuz i had to turn my crank

[jr_ss]

OEM would be the best option. ACL are all one size, typically there is a variance from one bearing to the next. With ACL bearings, one may be too tight or loose, which can be corrected with a different size. OEM has a wide range of sizes.

[Croustibat]

OEM all the way. I think there are 4 sizes available for standard and reground. If you are sure the block has never been machined, use the numbers on crank / rods / block to get the right reference. If you are unsure, use plastigauge.

OEMs are tri metal, too.