The M4 might be relatively new as far as the moniker is concerned, but as far as the midsize two-door high-performance coupe formerly known as the M3, it’s been royalty ever since it first hit the market back in 1985. It was quite literally everything you wanted in a car, it was fast, handled like a dream, all while proving a certain level of comfort among many other things. It made you want to take the long way everywhere you went just because it was such a fantastic car to drive. With that being said, imagine what it takes for reputable aftermarket tuners to take the “Ultimate Driving Machine” and make it even better. Take a company like Dinan for example, one of their latest models the S2 M4 is a complete monster and depending on how you look at it that can be either a good or bad thing.

Before I break down the difference of perspectives, let’s get a little background on the S2. Most notably, the drastic increase in power. Off the showroom, the nastiest M4 you can buy is the Competition Package which has 444hp and an estimated 420lb-ft of torque coming from a 3.0L twin-turbo inline six-cylinder which is sent only to the rear wheels. There is the M4 CS that has 460hp but it doesn’t appear to be available on the BMW website. Regardless, the Dinan S2 puts them both to shame with a staggering 548hp and 549lb-ft of torque, thanks to a few key upgrades such as the “Dinantronics Performance Tuner Stage 3 kit”. That alone makes a drastic difference, but when combined with a new high flow X-Pipe with a high-performance heat exchanger, carbon fiber cold air intake, and free flow stainless steel exhaust, all of which are Dinan products, you end up with a tire destroying beast.

Photo: superstreetonline
Photo: superstreetonline

That mountain of power might be the most eye-catching, but the most important upgrade worth mentioning is the new suspension system. This is a touchy subject and one that most BMW enthusiasts do not take lightly. The handling is 90% of what makes the M cars so special in the first place. Dinan not being one to shy away from a challenge, they installed new sway bars, adjustable camber plates, tension strut kit, rear link kit, and a fully adjustable coil-over suspension system. That’s a lot of M parts to be swapping out which must be a nerve-racking thing to do, even if you’re replacing them with high-quality Dinan pieces.

This is where things get a bit tricky. According to most reports, the suspension system on the Dinan is so good that it’s almost too good. If you’re saying to yourself “there’s no such thing as too good when it comes to suspension, especially one made with Dinan and M components,” that tells me that you’re a hardcore BMW enthusiast and this car will be perfect for you. However, for everyone else including your average enthusiasts, the Dinan S2 might actually be too much, too “hardcore.” It’s apparently so stiff that you’re going to feel every pebble on the road and unless you happen to be cruising along a perfectly manicured racetrack you could very well shatter your spine. Granted, there are adjustments on the suspension but even still it’s significantly tighter than the standard M4.

Photo: autoweek
Photo: superstreetonline

That is great news for the potential owners that are looking to have their car be as fast as possible when at the track or high-speed canyon blasts. But for someone that plans on using it as a daily driver, it might be something you want to seriously consider before purchasing the upgrades. Speaking of cost, surprisingly it’s not going to cost you an arm and a leg to get such a drastic increase of performance. The suspension and engine upgrades will set you back approximately $13,200 if you opt for the carbon fiber splitter and spoiler it’ll be another $2,200. And if you really want to complete the package you can get a set of lightweight forged wheels for “just” $6,500 more.

I went to the BMW website and built the ultimate M4 with the competition package and just about every other option available, and the MSRP as built was $85,039. Even if you add an additional $22,00 for the Dinan S2 upgrades, that still puts you well under the $125,000+ it’ll cost you for the M4 GTS or M4 CS, but yet significantly more powerful and potentially better handling. Hence why it would be the perfect car for someone who wants to get as much as humanly possible out of the car and who won’t hesitate to run it on the ragged edge everywhere it goes. If that’s not you, it might be best to stick with the standard M4. Which for the record, in no way is that a bad thing considering that even the standard M4 is a magnificent machine and one that should be cherished.

Photo: autoweek
Photo: autoweek
Photo: autoweek
Photo: autoweek
Photo: autoweek
Photo: autoweek
Photo: autoweek
Photo: superstreetonline
Photo: superstreetonline
Photo: superstreetonline
Photo: superstreetonline
Photo: superstreetonline
Photo: superstreetonline
Photo: superstreetonline
Photo: superstreetonline