I got it done for £150 . its fairly loud.
i change the backbox and the middle section, u can see it right under the driver side, its like a silencer or something but got that removed. so i dont know if u call that a full system. and its maybe a little faster cause wen i hit 5500rmp in 2nd gear it seems different, probs the exhaust sound loud thats why making me think its faster.