Hey people, I'm after a bit of advice on an exhaust system. I have seen on RHDjapan for Â£1200 the Mugen sports header with catalytic converter and was wondering if anyone on the forum has had one? Are they worth the money or would my money be better spent buying a tegiwa exhaust manifold header and buy a 400cel cat? I am looking to get the car mapped in august and i am slowly starting to add parts to the car now. I have bought and fitted an ARC induction box so far (sounds fantastic) and in the process of buying an rrc manifold.