Ive had mine for about 8 years standard engine got abuse daily for 3 years on ct9 and td04 homebrew tune in the shed i sold that 1 on running to a friend after I put shitloads of mileage on it, with only ever basic servicing done to it! Had my tm developments forged lump for 5 years now again only basic servicing run td04 and now td05 and touch wood its never skipped a beat! Dont get me started on gearboxes tho lol their chocolate haha first 1 lasted ages then It all went downhill had a collection of them now lol the 85 box is just as bad too