So after a lot of shouting and swearing i finally got the TIP on. I had the old one off in a flash, no problems there
Things started going wrong when it came to fitting the new one, it just didnt seem to want to line up......and then I realised I had it routed wrong.......doh!!
Once it was routed right it fell into place
Took it a quick run round the block once it was on and it does seem a wee bit louder on spool up, havent booted it yet so still to see the full effect. Has added a few more pops and bangs though