fitting exhaust

[bobajob]

I'm trying to fit early downpipes (with the recess) to a late engine (from an x1) that originally had the non-recessed down pipes. I've bought new castleated nuts and gaskets and have a assortment of collets. There are 2 type of collet, long and short. I'm pretty certain that the longer collets go with the readier downpipes but I can't bet the pipes to locate securely when I tighten the castleated nuts. We fully tightened there is still a lot of play. I'm assuming I fitting the collets the correct way round with the wide end facing the cylinder head.

Any help gratefully received!

Thanks

Bob

[bobajob]

OK, I've sorted it, although won't be completely sure until the engine is running. I used the larger collets / split rings and cleaned the threads and gave it another go. I was surprised just how tight the castle nuts need to be, no wonder they get chewed up.