Good luck with your future mods. If you buy a sport exhaust expecting anything other than a different exhaust note, you'll be disappointed. No sport mode even needed although it has it! Subtle bumper and sill changes made the M-Sport more aggressive, highlighted by the Black over Dakota Sport leather. I think the headers will require a tune and the X-pipe should increase scavenging. I had a question about the Dinan intake; are oiled filters a requirement? Where were you looking that showed all these mods for the 535? I like that it is a nice, refined sound. Power is delivered through a smooth shifting 6-speed manual transmission. Annoying highway drone has also been engineered out of the system.
It's all a matter of how much you're willing to spend. It now happens without any surprise lurching. The Air Mass Meter is available for both the 545 and 550, for use in conjunction with the High Flow Intake Systems. I have a 550 sport and it just doesn't feel like the beast it should be. I have stock 550i and i feel sluggish every time when i try to stop or push engine driving me nuts. Careful attention to detail ensures a perfect fit using the factory hangers. Dinan High Flow Throttle Body 3.
I just listened to a YouTube vid. Best money I spent, other than buying the car of course ; Notoriouse60. I would even say the car has smoother power delivery and shifting now than before not that the shifting itself is smoother because it doesn't do anything to shifting but that the power out of a gear and into the next is smoother, thus making the shifting appear faster, stronger and smoother. Some people have had issues, many have not but it is definitely possible. Matching Stage 4 engine software ensures optimum performance and drivability. The tranny in the car I have read about in many online sources is estimated to handle upwards of 500hp and we're nowhere near that. It is very quick out of the hole, and will stay aside, ahead, or on the tail of any bmw to speeds approaching 140 mph.
It all comes down to effort. Then I do agree that above 4k or so to the newly raised limit, it screams a bit louder not that the 550i Sport with the performance exhaust was particularly quiet in that range to begin with. At lower speeds, the frenetic steering we noted on our stays well hidden, too. I would think the Dinan options would be the best route to explore, however, from experience, the 550i out of the box for straight line performance is very competitive with anything at the track. By the time you added the supercharger, the head work, exhaust, and some other you-might-as-wells, you could buy an M5.
Also it comes from Dinan so they obviously believe it should be there and their claimed gains only apply when using one. Power is delivered through a smooth shifting 6-speed manual transmission. The exhaust gives you a just the right hint of sound, on the highway; you don't even know it's there. By the time you added the supercharger, the head work, exhaust, and some other you-might-as-wells, you could buy an M5. Eisenmann, Borla, Remis, Flowmaster, MagnaFlow, SuperSpring, etc.
I have seen throughout the web that our engines, stock, dyno generally at just over 300hp seen 302-309 and just under 300 tq 295-300 so I can use that as a baseline to a great extent. If that doesn't do the trick nothing will. All 5-Series come with comprehensive stability technology that includes dynamic stability control, dynamic traction control, and dynamic brake control. Power is only as good as your ability to use it. I like the route you went with doing everything except the exhaust; to me, the stock exhaust sounds decent but I have never been one to be in love with a loud exhaust. Good luck with your future mods. On the other hand, Dinan's last project 5-series was an E60 Steptronic 2004 545i that made a dyno-certified 354 hp, up from stock 325 hp, a 29 hp increase.
If anything it feels slower between 40-70mph, go figure. I was either thinking about doing what you did first or going with some supersprint headers. That it comes to market at 50% of the going rate of Ms is an extra bonus. Also, they do provide a bit less filtering. That should leave this 550i right around or just north of 400 horsepower as the seller suggests.
The wheels are driven via a variable differential lock and a special dynamic stability control program unique to the M5. Steve Dinan himself states that in it's current form, my car can now keep up but not obliterate the E39 M5. This really is a nice, and more affordable, M5 alternative. But I've always wanted a Dinan-tuned 5-series for the longest time. Look at the entire post. It literally feels like a different car and is hugely fast.