who have u used and how much wossit?
Did brakes need upgrading?
Any thin else need changin?

Also, who in WA did u buy a CA18det from? again HMWas it?

I feel the standard Nissan cooler is a waste of time. So I had a custom one fabricated, which goes under the front bumper. (600 x 120 x 80)It aint huge but it's more efficient than the standard nissan item. The engineers I spoke to all advised against cutting up the radiator support in any major way.

Hey mate what year is your coupe and did u use the standard intercooler or get a custom one?

I'm going through the same process in WA with my CA-18DET Coupe. Basically the key to my car meeting the requirements was an approved catalytic convertor, purge tank and a exhaust test that was less than 90db.