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I'm running a maxed out jb+ atm. Another guy has a jb4 on his m35 x2. He's getting the EWG connector to do more testing with terry at BMS. My car is seeing close to 30psi in the mid range and tapering to 25/26 by redline. There a company called piper cross that makes a drop in filter for the f40. I cross referenced both filter part number and it's the same part. The high flow filter can be had for about 70$ shipped from the UK.
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