Exhaust pipes into head A10

[Swarfcut]

    Other brands.....That's how Ariel did it on the Huntmaster.  You often see Huntmaster Cylinder Heads mis-described as A7 or A10 as the basic casting looks the same, but the clincher is the stubs.

 Certainly a better idea, but no standard pipes available for BSA, dunno if Huntmaster pipes would fit.

 Swarfy

[berger]

i have put  stepped ally inserts in the head interference fit and pegged with a 3/16ths allen grub screw fixed between two head fins near the exhaust port opening. the pipes fit over them and but up to the step and  have been ok for years

[AdrianJ]

I could only find siamese pipes at Armours. They were very helpful, when I ordered.  Interestingly they don’t have a proper bracket, just a stud welded to the pipe, when fitted you can make a correctly sized bracket to fit between the stud and the engine stud. They were a pain to get into the head though. Sorted when I realised they weren’t  exactly round. Judicious use of a vice sorted this. Overall I’m happy with Armours for my iron head plunger.

[dave55]

Hello, after cleaning some very hard crap out of exhaust ports the pipes went in right up to the shoulder and when tightened up seem like they will be fine without any sealant, i am guessing previous owner must have not cleaned port out and old string and some sort of plumbers sealing putty was preventing pipe going up to shoulder on right hand side.
Alls well that ends well !  Thanks Dave