Well I'm not really sure thats the thing, the TMU officer pointed out manual boost controller, pod+intercooler and loud exhaust, now gone back to stock with the controller cos it was useless anyway, airbox is on (N/A one doesnt even fit ) and the exhaust I suppose has to be under 90dB. It doesn't specifically state any modifications on the form but it says "Emission Control Systems And Noise" as the title $80.70 to get it tested it says.