Picked these up this morning... chinese made, seem very good quality, stainless steel with pressure fitting that grip when pushed on, took all of 10 seconds, I guess you can add a little self tapper for security but dont think I will bother I dont think they will rattle off although they could be pulled off by a toerag I suppose. Bit of a bargain at less than 20 quid imho... link is here
https://www.amazon.co.uk/Top-Longer-Stainless-Steel-Exhaust-Polished/dp/B017XLG2H8/ref=sr_1_1?ie=UTF8&qid=1527840385&sr=8-1&keywords=top+longer+exhaust+tips



https://www.amazon.co.uk/Top-Longer-Stainless-Steel-Exhaust-Polished/dp/B017XLG2H8/ref=sr_1_1?ie=UTF8&qid=1527840385&sr=8-1&keywords=top+longer+exhaust+tips







