Recently bought these Thornton JR exh manifolds, from fusick. Good price fast service. Here it comes the but,
When I went to put them on
The passenger side bolt holes are “larger in diameter than the drivers side” (Bolts and washer still fit).
Im questioning if after some heat cycles that there might not be enough material in the area and crack the manifold.
Called Thornton and they kept saying we sell 200 of these with no questions. Asked to pull one off the shelf (to measure / shut me up)
but lucky for me they said they have none. They did say that they would be happy to give me a full refund.
I don’t think my eyes are playing tricks on me.

Is there anyone out there that has a set of these and can share some info?
thanks Brian

 

I’ve been running a set on my Cutlass 350 for about 5 years with no problems

 

Did you notice if the passenger and drivers side bolt holes on the manifold are the same size or different?