Frankfly:<P>Yes you are 100% correct, However I couldn't see anyone silly enough to run around the streets with a pair of vice grips on their brake line or other method to block off the back brakes []images/icons/default/grin.gif" border="0[/]<P>The above methods are tempory while doing burnouts on a legal burnout pad. I do not recommand that anyone does burnouts on the street, you risk getting your car taken off you and sold at auction by the Police.<P>A variable brake proportioning valve system is not suitable for burnouts, even though you bias all the brakes to the front, the rear will still drag, 90 seconds of draging with your motor under full song will have you with a pretty nice set of cherry red disks or drums and mabe fried pads []images/icons/default/wink.gif" border="0[/]<P>Cheers,<P>Stan.