Just forked over $1200 for an agreed value ($38000) policy on my XR6, including all options and mods. For those NOT in Sydney, I know you pay less, but you don't live in the 'pay-thru-the-nose-for-everything' capital of Australia. A good deal, considering my last quote from NRMA was $1500. The best I'd got before was a Ford Insure quote, which some might remember me discussing but that was still $1400. Some were in the $2K+ range so I figure I've done well. Having CTP Greenslip, membership and home contents helped lower it, and having had my EA insured at 60% NCB for 3 years, I got NCB protection for no extra cost.
At least while the car remains mildly-modified, NRMA should do the trick.
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