Now, we would go further into it right here but it seems BM Blog; BuildJournal has done it for us with an impressively in depth review.
Now if you're on the fence about whether this review is worth your time, allow us to tell you a bit more about this blog. Started by a true enthusiast and BMW E46 M3 owner, BuildJournal exhibits comprehensive DIY guides, reviews, news, tech guides and videos.
They also tune S54 engines and code F30 vehicles but their reason for only tuning those 2 is my favourite part. "Why only those 2? Well, because, that's what I personally drive."
Click here to read the full review