I got mine for £180 delivered, full stainless steel, except for the welds, as mentioned, they have started to go rusty after nearly 3 years, it is used all through winter too. With the 2.5" ebay decats I paid £300 for a full turbo back system, fitment was spot on, for what I paid I can't really fault it! I'm in TTC, and my car is quieter that most BPU's in sequential I hear, this may be due to the 2.5" decats though. It sounds great on boost, the drone is liveable off boost cruising on the motorway, you can hear the exhaust but you don't have to raise your voice to talk above it. As for the performance I can't honestly say, but as some singles still use 3" catbacks without running into flow restrictions, I guess you would be ok