Hi, For my stage 3 build I have sourced a OEM RS4 PRV (I think 145 bar). My tuner is suggesting I get a 155 bar PRV instead. APR has one, and its very pricey. There is also a more affordable 165 bar PRV from a UK tuner that is cheaper than the APR product. I am thinking of getting the 165 bar PRV. What I need to know is: are there downsides / drawbacks to going with the higher pressure valve? Or put another way: why would not all PRVs be 165 (or higher) bar?
