Radiator cap question

mtoxracerfss

Boost Addict
Oct 8, 2005
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Toledo
When I take my car to the track, or after 20-30 mins all out "beating" , my coolant boils over. Only when i beat on it does this happen. I have a HKS MHG torqued to 80. When i lift my hood i can hear seeping out of my radiator cap. It is a new cap from Auto zone, only had it a month. Could it really be that crappy of a cap that it would go bad already? Or is it just a low pressure cap?