I read 15.5K for 5, regular $3750 per. Of coarse there is still shipping/ duty. It may sound expensive, but it will be the best option for the car if you want to play. Ready to bolt in with your gear choice. If you have no drive line mods you will save $400- 450 no longer needing the 1 pc drive shaft adapter, and $400 on the Harrop cover at a minimum. No $1000 Kaaz drifting diff. to buy, and gear set choices are limitless. If there is any interest I'll research further. For around $5K you could have a 12 bolt IRS, BMR axles, and a Denny's aluminum drive shaft. Sounds more like a GTO already
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http://www.harrop.com.au/root_folder..._irs_diff.html