In my experience (4 defect notices -all corrected when went over the pits) 100mm clearance under the car is what they look at but if there are signs that the car is not handling correctly with any aftermarket setup they won't pass you. Yes cops can be c&#ts and can defect u for anything (carefull of ur attitude) If ur car has been setup right it can handle brilliantly, be fast, be legal and look good . . .but if ur gonna do it, do it properly.

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"ALLPAWS" 2014 WRX RS 40 - modding very slowly.
2002 Mitsubishi Airtrek Turbo R - Ralliart Edition (daily)
2010 Nissan GT-R - when the Missus let's me drive it :)
Crotch Rockets . . .