bosch 237 f/p regulator

[6pack]

I thought this was a non adjustable regulator? Please correct me if I am wrong, I am looking at a 237 to buy but I want an adjustable and he says it is an adjustable. Here is the part number he gave me....0 280 160 237

 

[REDS HOT AIR]

some have been made into adjustable ones
but not originally.

ask if the top half is alum.
if so it will be fine if its still metal then id pass on it