Shadow's SS

iTrader: (1)

What Pressure cap should I be using? Becool sells a 13 and a 21 PSI cap.. the OEM is 18 I know that the boiling point is determined by PSI but im not sure how this translates to effects on the engine and pump. I feel like 13 is too low but also feel that over 18 is too much. what are your thoughts??

demonspeed

iTrader: (7)

OEM. I just put a new ACDelco cap on last week, actually. This is one of those things I'd prefer not to overthink

Shadow's SS

iTrader: (1)

Thanks