This is a stock style replacement bearing with a bimetal design. This is recommended for a rebuild, or a basic bolt on, naturally aspirated Mod Motor. We recommend stepping up to a H Series bearing for any vehicles planning on raising power levels above basic bolt ons.
This is going to be a stock style replacement trimetal design, or a bearing that will not be taking high horsepower abuse. MHS recommends not using this bearing if your engine will be seeing over 500 horsepower at any point in its life.
This is going to be your high horsepower, high abuse tolerance bearings. This series of bearing makes up about 90% of Clevite's Performance bearing sales. MHS suggests using an H Series bearing in any vehicle seeing forced induction of any kind, or high RPM runs. MHS runs H Series bearings in all of the engine builds that leave our facility.