D30M Front Bearing

D30M Front bearing

The STS Original sealed bearing, accept no substitutes (Seriously, these are STS branded on the shields, why risk some shady no name?).  An air leak can seize your engine, killing your engine and fun.

STS Recommends that you swap out the front bearing every gallon. I personally recommend you swap the front and main at the same time. After the piston and sleeve, nothing gets more wear than the engine bearings.  I call it cheap insurance.