shorty headers

[bake315]

Have some shorty headers that came with my C20.  I'm skeptical that I could use them - they have a 2-1/2" diameter, but only uses 2 flange bolts.  What do you think?  Any use, or shall I consign them to the classifieds?

Here are the pics....

[86 chevy silverado]

The headers you have there look like the type that takes place of your manifolds, I used that type on a truck in the past and used the stock exhaust to the cat and put a cat back system from there. They have the two bolt flange to bolt onto your stock down pipes or Y pipe whichever applies.