Description. Nitrous Express WOT/Digital RPM Window Switch. Monitors engine RPM. Monitors throttle position. Ensures nitrous will only activate within RPM and TPS limits. LCD screen with adjustable contrast. Compatible with all 1 to 12 cylinder engines. Works with: coil on plug, waste spark, distributor, or crank trigger based ignition systems .... 1998-1999 LS1 cars had a smaller throttle body cam, which caused the throttle to open to WOT faster than 2000+ cars 13. Customers can also contact us for an automotive engine quote via our Got Engines Quote Submission Box on the top of the page, but to be sure you get the best pricing, and the engine you need, please call us Toll Free at: 941-269-8284.