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Tuner Tuesday: 2008 BMW 550i M-Sport Dinan 5

I still remember well when the new E60 5-series launched. I was not impressed. It looked modern, sure, but it also looked very heavy and it was full of odd angles. It was expensive, too, and though the M5 came with a massive screaming V10, the rest of the run seemed to be pretty tame. But BMW offered steady upgrades throughout production, and the post-LCI sedans really came into their own with the M-Sport package. A few weeks ago I posted a ’08 550i M-Sport 6-speed on our Facebook page, and its popularity proved that more people are beginning to appreciate the performance value offered in this unique package. Having spent the past half year with a E61 Sport, they are really fantastic cars to drive and ooze quality and you can count me among the converted. Today I have another 550i M-Sport 6-speed, but this one has been turned up a few notches by Dinan:

CLICK FOR DETAILS: 2008 BMW 550i M-Sport on eBay

Year: 2008
Model: 550i M-Sport
Engine: 4.8 liter V8
Transmission: 6-speed manual
Mileage: 126,297 mi
Price: $15,698 Buy It Now


You are viewing an EXTRA CLEAN… 2008 BMW 550i DINAN 5. Iconic, raw power, luxury, simply put, a high performance sedan for the everyday driver. The BMW 5-series is a class leader in performance, safety and luxury. This vehicle has a CLEAN title and CLEAN history. It is equipped with the fully loaded premium and M//Sport package. This BMW features plenty of top-of-the line amenities which include; leather seats, heated seats, multi-directional power seats, memory seats, power windows, power locks, power exterior mirrors, navigation, i-drive information system, premium audio, xenon head lights, privacy shades and much more (view pictures and information below for full detail). You will enjoy all the comfort features this vehicle offers in a clean good running vehicle. This vehicle has been well cared for (view the pictures below for full condition detail). Overall, this is an excellent condition vehicle inside and out, and it runs and drives just as good as it looks! The powerful 4.8L V8 engine moves this vehicle with ease. Power is delivered through a smooth shifting 6-speed manual transmission. The Dinan Stage 3 tuned ECU, Dinan Exhaust, Dinan Intake and Dinan High Flow Throttle Body help this BMW accelerate like a rocket and maintain power on demand. It is truly a joy drive this vehicle. The ride is firm and well-controlled, and the front end is tight. This vehicle is fully serviced with a synthetic Mobil One oil change & filter, It also has new front and back Zimmerman Disc Rotors (2 months), new front and rear Textar brake pads (2 months), new Bilstein M-Technique struts and shocks (6 months), new Tires (6 months). The 172 Wheels does not have scratches nor curb rash. I also have three sets of keys.



Push Start/Stop

Front & Rear Parking Sensors

Premium Wood Trim Package

Sport Wheel

Sport Seating Package

Heated Front Seats

Memory Seats

Power Rear Sunshade

Rear Door Privacy Sunshades

Power Sunroof

Premium Audio

Xenon Headlamps

Steering Wheel Audio Controls

19″ Inch 172 Wheels, P245/35/19 Front, P275/30/19 Rear

Dinan Stage 3 Tuned ECU

Dinan Exhaust

Dinan Intake

Dinan high flow throttle body

Rear Spoiler

Roof Spoiler

What does the Dinan work do to the already fairly potent N62? I couldn’t find final power numbers, but the software removes the speed governor and raises the redline. Fora discussing the changes seem to indicate there is a demonstrable change in the attitude of the engine, especially in throttle response and that the car’s power numbers listed. Supposedly, the intake alone is good for 18 horsepower so the full lot of throttle body, intake, exhaust and software should add more than 10% to the output. That should leave this 550i right around or just north of 400 horsepower, and mated to the manual transmission the experience should be pretty close to M5 levels. What is clear is how much those modifications cost originally; without installation, the Stage 3 software runs $559, the exhaust is $1,338, the intake is $1,132 and to top it off the throttle body is a further $926. All told, you’re out the door with $5,000 or more worth of Dinan bits, but outside of the discrete badge you wouldn’t know it. Retaining the original M-Sport bits is great; the Style 172 wheels are the highlight for me and I think the best looking wheel on this package, held up by the also great M-Sport suspension. Subtle bumper and sill changes made the M-Sport more aggressive, highlighted by the Black over Dakota Sport leather. This really is a nice, and more affordable, M5 alternative. Miles may be slightly higher at 126,000, but the condition appears great and the “Buy It Now” of only $15,600 seems like a steal compared to the M5 prices. This really is an unappreciated enthusiast platform that lies in the shadow of the big bad V10.