I went to Powerflow in Redhill with my Ark as I wanted rolled tips too. They did a great job and, here's their website link http://www.powerflowexhausts.co.uk/dealer-locator/ and here's my Ark with rolled tips http://www.350z-uk.com/topic/58750-how-to-smurfadise-a-zedbrembos-p20/page__st__320 (page 17)