So after using my weak google fu, and looking for stronger/better/longer lasting parts. The general consensus seems to be use factory parts, But I don't always feel like that is the case. Like in the event of the 5040 idler arm which has a larger shaft diameter than the sankei 555 and switching over to brass bushing for it when they get worn.

idler arm: http://www.4crawler.com/4x4/ForSale/IdlerArm.shtml#FAQ

has anyone else discovered better than factory parts?

 

Only after Toyota parts are obsolete and I have no other options in the area of Steering and Suspension and Engine Electronics do I look at after market

 

Exactly what parts are you looking for?

I second this^^^.

O.P.
When you actually do find after-market parts that are "stronger/better/longer lasting parts" than OEM, please let us know

 

so one part out of 2,000 and you feel toyota parts aren't generally better than aftermarket? at least come up with multiple examples.