Exhaust Heat Riser Fastener

[pschlosser]

Can anyone tell me the type of fastener at the back-side of the heat riser?

The two front fasteners are short studs with nuts, and these screw into the exhaust manifold. But I believe something belongs in the back, affixing the lower part of the heat riser to the upper. My guess is it's some type of press-in springy fastener, something like those holding the standard instrument clear cover to the instrument assembly.

Any information is appreciated.

 

[70gtx440dana]

From memory..... it is a hex flange head screw with a course thread.

 

[pschlosser]

Good call. This would be something like a #12 x 3/4-inch lag bolt.

 

[mrbill426]

Looks like flange nuts.