i am trying to figure out what UHL means because on the papers that came with my manley rods there is 2 different touque specs. the only difference is the UHL.. there is 1.5 " and 1.6 " . i am a bit confused, can some one give me some info?

 

"UHL"...under head length??

Measure the length of the bolt under the head and see if that makes sense.

 

thanx for the response. i had figured it was that but i didnt want to question it cause, well rod bolts are kind of... important haha. thanx again.