seriously mate, renault parts are better..i'm having to fork out for another new exhaust because I went outside of renault. Like what Martin aboves pointed out, I think that unless you get the exact fit parts from renault you won't be happy with the performance or sound of your car, thats why they cost more. It's up to you what you do, the lure of cheaper parts is very attractive, but from my experience you only end up regretting it and spending more to make it perfect again.