Exhaust thread size?

[Crazy4408pac]

Anyone know the size and thread count of the exhaust. Trying to buy some stainless studs from McMasters Carr.
Thanks

 

[Denvermike]

My stock 360 heads have 5/16 course threads. Hope this helps.
Mike

 

[nerd racing]

Same Size Here. 5/16 UNC.

 

[Crazy4408pac]

These are for a 440.. How about the length? This is what they suggest.

Overall Length 1 1/2"Thread Length (A)3/4"(B)1/2"Additional Specifications18-8 Stainless Steel5/16"-18

 

[moe7404]

big hint: DO use anti-seize compound on ALL threads on ext systems and all the other threads on the bottom of the truck. and do NOT use cad plate bolts on ext systems. the heat will make the cad plate come loose and jam the threads. and any chryslers that have flange to flange connections do use the largest bolt that fit. a under size bolt will get loose.