The new ISR rules in drag racing allow starting line Studder Boxes in Imp 1000, all of Pro Stock, Heavy Mod and Open Mod. We have Studder boxes available for all brands of sleds that use the stock ignition and use a VDO tach. The price for just the box is $75.95US and the price with the box and the push button is $129.95US. email us or call 519-676-4265. -- Bill