DUE TO AN INCREASING FREQUENCY OF D.I.Y. EXHAUST MODIFICATIONS AND POOR PRODUCT DESIGNS, VEHICLES EQUIPPED WITH "DIFF DUMP" STYLE EXHAUST SYSTEMS MAY INCUR ADDITIONAL CHARGES IF SYSTEMS ARE INACCESSIBLE TO OUR DYNO LAMBDA SENSORS. SHOULD SUCH MODIFICATIONS BE NECESSARY AND/OR OXYGEN SENSOR BUNGS BE REQUIRED TO BE INSTALLED TO COMPLETE YOUR TUNING, THIS WILL BE COMPLETED PROACTIVELY AND WILL BE BILLED HOURLY AT PERFORMANCE RATES. THIS IS FOR THE SAFETY OF VEHICLES, EQUIPMENT AND OUR TEAM.