Well Robert, the standard GDI set up was also marginal on emissions. Following in the footsteps of the Plus 4 Supersports, which also had big issues at the start. I did wrap the manifolds for a short period, but was wary about heat sink into the head, so now I have an insulated cover over the manifold to retain heat.
With respect to the Akrapovic catalytic converter inserts, so far I've had zero progress. I would like to try one and it needs to be 48mm diam to fit inside the front of the main silencer.
I enquired at Demon Tweeks. The reply was these are for motor bikes. That was it.
I tried another supplier. His response was that he orders by motorbike model and has no idea of the dimensions. So neither were helpful at all!!
It may not work, but it's worth a shot. A bigger cat is possible but expensive. I see the complete AR system now costs £3,200.
I'm going to try the baffled main silencer and use the original air filter instead of K&N, as a first step.
