Guy on here called Broomer got some cheap stainless steel de-cats from eBay for £75 I think it was. This is his build thread; http://www.350z-uk.com/topic/73426-broomers-zoe-the-zed/page__st__20#entry1159680 Just thought I'd mention it in case you didn't want to spend silly money on expensive de-cats, ..after all there just steel pipes.