I'm looking to buy a pyrometer for my truck, Isspro brand. What length of probe should I go w/ the 2.5" or 1.5''?? I'm going to be installing it into the manifold before the turbo. I wasn't expecting 2 lengths for the same probe..
Thanks

 

1.5" is fine. If I remember right you want it to be in the center of the opening.

 

Thanks for the help.