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ORIGINAL: import slayer
I've heard of a bottle heater but what is a window switch?
A window switch is a device that you connect through your setup that will only allow the nitrous to flow between a specified RPM range, say 3000-5800. You can also get these with first gear lockout, which will solve some of the initial hits traction problems. www.bmnracetech.com is the way to go IMO. Most of the other window switches require pills/modules that you have to purchase seperately to set the RPM range. The BMN unit is a simple as turning a dial.