Can´t you get the 182 manifold via Renault Motorsports, should be around the 300 mark...
part no is 7711155545
Fit it yourself. Just a subframe lowered job
switching 172 cats is just disgusting work for people with childish hands. imo it is worth the hassle to upgrade to a 182 mani, cat/decat exchange is about half an hour then...
You can't just use a 182 cat though can you? You either have to buy the K-tec sports cat or decat.
The limit for mine is 0.20%...mine was 0.17% and that was at the 3rd attempt I think! Pulled the sensor out a bit.
Seems mine is poorly and running very rich