Sealed Induction Kits - Pipercross Viper or BMC CDA
Hillpower.co.uk do a kit where filter is almost entirely covered with an aluminium heatshield and has been tested to be good AND filter doesnt suffer from heatsoak, Also get good noise.
Hillpower also do the Group-N ECU, It is a direct replacement for the original ECU and not a piggy-back addon
There are some pics of the above on the website, See other recent post for Hillpower members prices.