reliability

Hi all, Reliability is paramount in my new build. I am contemplating three different turbo options: BNR S3 BNR S4 GT3076R (used, but same price as the aforementioned BNR kits) I am ignorant, but I figured the S4 would be a great fit since I can have it tuned for lower psi and only really have...

Hey guys. First time on the forum and looking for some insight from long term owners or knowledgeable mechanics. I own a 2012 Mazdaspeed 3, 125,000 miles, owned since new and maintained very strictly, so the car runs very smoothly. Original turbo and engine components. The only modification I...