NITROUS (NOS) REVIEW
I have never had a problem with Holley products. As a kid I watched my dad use them religiously. But I do not suggest the NOS purge switch (momentary). In a years time I have burned through 3 of these in 2 different cars. Also when I was moving parts I sent at least 3 of them back to NOS from customers who wanted the MFG warranty.
I think it was designed (ORIGINALLY) to only be armed when the arming switch is activated. However with the popularity of gas, and the "purge only" or "show kits" NOS needed the schematics to allow for a "direct" hot connection so you can purge independanty of the NOS & FUEL solenoids being armed. At the end of the day I think that this switch is underengineered for a constant positive batt source and the contacts burnout prematurely. I replaced it this time w/ a NAPA heavy duty momentary and have had no issues.
NOS PART NUMBER: 15610NOS
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