| runs a 1.2 cap???
The Nismo radiator cap is a heavy duty radiator cap, which operates at 18.2 lbs (1.3 kg/cm) compared to 12.6 lbs (0.9 kg/cm) non-turbo and 16.8 lbs. (1.2 kg/cm) turbo Nissan OE(Original Equipment) stock caps.
I seriously doubt that the .1 difference between the Nismo cap and a stock TT cap will cause any problems, but if the Koyo radiator can't handle over 12.6 lbs (0.9 kg/cm), then maybe you do have a problem. That would mean you are 3.6 lbs.(.4 kg/cm) over the recommended max pressure. My Howe recommends a 22-24 lb. (22lbs=1.55 kg/cm) radiator cap. The Nismo Cap is under that by at least 4 lbs, so I don't think I have anything to worry about. As long as you make sure all your coolant, hoses, and connections are OK like you should be doing anyway, you'll be fine.
Hello, my name is Jason... and I am a boost addict. (step 1: acceptance) "Who cares? Peak power is the only thing that matters, Super Street said so." - fourZero 
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