Bob, I've not tried K&N but I have fitted the very similar ITG filter element to my 4/4. Hard to say if it makes any real difference but at least airflow will remain consistent and it no doubt all helps with the rest of my mods. Mogsport sourced mine for me and were very helpful.
You could also look at the filter and intake set up that RPM do for the Sigma engine. It reroutes the filter and brings in cooler air from the side louvres which looks interesting. Something I was thinking about if I don't go down the more expensive route of throttle bodies.
Last edited by Jays; 14/03/12 06:47 AM. Reason: Ps
