P PennLandy New Member Sep 30, 2014 #1 Can anyone tell me the nut/bolt size/pattern for a series 3 2.25 petrol front pipe to manifold connection ? can't seem to get the details anywhere and not too happy leaving the PO's homemade brass efforts on my new exhaust !!
Can anyone tell me the nut/bolt size/pattern for a series 3 2.25 petrol front pipe to manifold connection ? can't seem to get the details anywhere and not too happy leaving the PO's homemade brass efforts on my new exhaust !!
D divie Well-Known Member Sep 30, 2014 #2 Should be 5/16 UNF and yes they should be Brass, this is to stop then seizing to the stud.