Tools & Fabrication - Angle finder?

Looking at umi torque arm tunnel mount w/ dsl... An add on option is the angle finder... What would I need this for? Also does anyone have this with true duels? How much clearance would I have if I ran duels underneath the dsl bar on a stock height 99 trans am

you need the magnetic angle finder to get the pinion angle set back to approximatly factory position to start then you can start adjusting for better traction...

Ok so it's a must?

You can get an angle finder at about any HomeDepot,lowes,hardor freight,hardwear store for around 10 bucks. as far as your duals with a tunnel mount TA i dont think your gonna clearence for your duals to go out the back you would have to dump them before the axle

We use the electronic protractor...Not $10, but has features that make angle comparison much faster and easier to read.
MSC and ENCO have them.

my torque arm kit came with a magnetic angle gauge,and instructions on how to set pinion angle.