Moroso Performance Vacuum Advance Kit Features: Maximum Part Throttle Performance While Preventing Harmful Effects Of Spark Knock Improves Throttle Response/Fuel Economy Limits Spark Advance In High Compression Engines And High Load Conditions To Eliminate Knock Built-In Stop Prevents Screw From Backing Out Height: 2.63 Width: 6.88 Length: 9.63 Weight: 0.75 lbs Fitment: UNIVERSAL 0 - 0 NON APPLICATION SPECIFIC