I have a 749S engine with a full exhaust system which I may sell. The engine has had a full refresh about a year ago by Biggelaar Special Performance in Holland. It came with a full print out from the dyno run and was putting out just under 120BHP at the rear wheel from memory. The heads have been gas flowed by Biggelaar. I can honestly say that the engine had only been used twice before I fitted my 999s engine so it still has plenty of life left in it.The exhaust system is a 45mm system with carbon cans and removable baffles which you do need at some circuits to get by the noise police. Question is can someone advise a guide price for the pair please. Regards Mark.