We can offer them for BMW 2V Boxer airheads with
52mm threads (800/1000 cm3) and exhaustpipe diameter 38mm and 40mm
48mm threads (450/650 cm3) and exhaustpipe diameter of 36mm
For example R100 , R80 , G/S , R , RT , RS , CS , RR , CC , R100RT , R100RT , R100RT , R100RS , R100R , R100GS , R80RT , R80RS , R80GS , R80G/S , and probably also for R70/90 , but please check threads and exhaustpipe diameter
To help you find out what size you need, I found this information at
http://www.geocities.com/knut_brauteset/discuss.htm#Repairs & Maintainance
BMW did not import any '78 R100RSs into the US with 40 mm exhaust.
AND virtually ALL '77 R100RSs (except one) came into the US with wire wheels,
plus most if not all had 40 exhaust mm in '77.
The way to tell if it has 40 or 38 mm exhaust is to look under the bike
near the footrest, at the muffler clamp.
If it is stamped with a 42, the clamp covers a 40 mm exhaust.
However, if it is stamped with a 40, it covers a 38 mm exhaust.
!! The shipment always includes one set for 2 cylinder heads !!
Against regular repair methodes you save:
New original nut, gaskets, disassembling time, repair costs, assembling time, valve adjustment,
But most of all you will never again need this ugly big exhaust nut wrench
