I think the Pa is the metric unit for pressure (Pascal, old dead dude). But the "hk" part is interesting. ..looks like "hecto kilo" (aka hundred thousand) a combo of metric prefixes. (there's no standard nomeclature, but most countries do combos, so try not to blame them!) According to here and here there are 6.895 kPa per psi. So 15 psi = 103 kPa = 1.03 hkPa. Considering the photos of the LED on the blitz webpage, this looks reasonable, but who the heck runs at 33 psi? (this is what you get after converting 2.30 hkPa "peak" warning as pictured on their website.) ...Well for all I know, maybe race cars do; this turbo stuff is still new to me.KurleeDaddeeWRX said:I would also like to know how to read the boost on this TT. What does hkpa mean. I need to know how to convert hkPa to psi. And how does that refer to boost?