Are they??

 

As one of the last bolt ons you do? sure.

 

I hear they can throw off the balance of the engine and tear up main bearings... I duno, thats why I dont have one yet.....

 

Ive near heard of an instance of one doing that...im sure in a miss manufactured pulley could throqw it off, but these trucks dont ahve harmonic balanacers, so it would be a long shot.

Juset liek he said, once your fully bolted, then get the ASAP

 

what p/n should we order for our trucks? there's 3 different ones. I'm not sure which is the one that will make the biggest difference.