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2008 BMW M5, equipped as follows: Space Gray Metallic, black leather interior, power sunshades, comfort access, heads up display, SMG transmission, NAV, IPod integration, Bluetooth integration, Satellite radio, HD radio, MP3 CD and DVD drives, 13 speaker premium sound, ventilated seats, full Merino leather with Alcantra headliner, Aluminum interior trim, heated rear seats, soft close doors, 20 function active seats, rear side impact air bags. Windows tinted by Pro Image. Twin 500 watt subwoofers with twin 12" JL audio sub woofers in a custom trunk enclosure, Blue LED under seat lighting, Passport Laser shifting radar built in, 3M clear mask system, DINAN freeflow exhaust, Dinan Stage 2 performance software, DINAN limited slip differential, DINAN high flow air intakes and Dinan Throttle body kit.

564 HP and 423 ft/lbs torque, or ONE really big smile!!!!

My M5 has been upgraded with the following:

DINAN Freeflow Exhaust

Emission Status:		50 State Emission Legal
Peak Horsepower Gain:		9 @ 8000 rpm
Peak Torque Gain:		6 lb-ft @ 8000 rpm

The Dinan M5 exhaust system provides maximum flow characteristics for optimum power gains while producing a civilized, yet very sporty exhaust note that is appropriately aggressive at wide open throttle. And there's none of that irritating low rpm "drone" that is common with so many aftermarket mufflers. The mufflers are manufactured from 100% 304 stainless steel inside and out for maximum resistance to corrosion and nearly a 30% reduction in weight, eliminating over 20 lbs.

The four 3.5" diameter polished stainless steel tips not only give the car a more aggressive look but also feature Dinan's new "Cool Tip" design that effectively reduces temperatures in order to minimize radiant heat that can effect body work over time, as well as avoid discoloration of the tips themselves. The Cool Tips also avoid the possibliity of a nasty burn while loading items in the trunk. Employing the principle of rarefaction, the design features an inner and outer tip with a vent at the base. When a positive pressure wave travels to the end of an open pipe and is ultimately expelled into the atmosphere, a rarefaction or momentary drop in density of the surrounding air is created behind it. This momentary drop in the density of the air surrounding the pipe's exit creates a vaccuum, pulling the air from the surrounding area to fill the void. The vent at the base of each outer tip then enables air to be drawn in, effectively cooling the tips

Utilizing the factory brackets and hangers, the Dinan exhaust mounts in a factory-like fashion for a perfect fit and clean installation.

DINAN Stage 2 engine CPU upgrade

Emission Status:		49 State Emission Legal
Peak Horsepower Gain:		15 @ 8100 rpm
Peak Torque Gain:		16 lb-ft @ 3000 rpm
Point Value:		2

Dinan Engine Software for the E60 M5 raises the factory rev-limiter by 150 rpm (8400 rpm maximum), endowing the V-10 with a broader power band and greater road speed potential in each gear. The software also removes the top speed governor, enabling the cars to attain their "natural" top speed; and the V-10s WILL pull right to red-line in top gear! The software also speeds up throttle response, providing a sportier feel and improved modulation capabilities.

The combination of Dinan's re-calibration of ignition timing and air/fuel ratios, along with a simple modification to the stock air filter elements, produces a maximum gain of 15 hp @ 8100 rpm and 15 lb-ft torque @ just 3000 rpm.

Dinan's software also provides re-calibration of the factory "torque limiting" programming, ensuring that maximum power is available under varying driving conditions.

The software is easily downloaded directly through the factory port by your Authorized Dinan Dealer. There's no need to remove the computer and there's no "in-line" or "piggy back" device to accomplish the modifications. As you might expect, only Dinan loads the program in the same manner BMW intended. And with Dinan's matching new-car warranty coverage, there's no need to worry about hiding the software from your dealer or removing a device before taking your car in for service or repair for fear of affecting your warranty coverage. Performance without sacrifice!

A Stage 2 version of the software has also been developed in order to take full advantage of the additional air-flow produced by the High Flow Throttle Bodies, optimizing both performance and drivability.

DINAN Throttle body upgrade

Emission Status:		50 State Emission Legal
Special Notes:		Stage 2 Engine Software Highly Recommended.
Peak Horsepower Gain:		13 @ 8100 rpm
Peak Torque Gain:		8 lb-ft @ 8100 rpm

The ten stock throttle bodies are carefully bored to a larger internal diameter, enabling the M5 to breathe more efficiently for increased power output and improved throttle response.

High Flow Air Mass Meter/Intake Assemblies (pair)

Emission Status	49 State Emission Legal

Maximum Horsepower Gain	21 @ 7500 rpm

Maximum Torque Gain	14 lb-ft @ 7500 rpm

High Flow Air Mass Meter/Intake Assemblies (pair)

Dinan's High Flow Air Mass Meter and Intake Assemblies reduce the intake restriction presented by the stock configuration for a better breathing M5. Increasing the flow of cool, oxygen rich air increases power output by 21 horsepower, as well as providing improved throttle response.

The stock air filter housings are replaced with Dinan's larger volume units that have been designed to accommodate oval shaped filters, providing greater surface area for superior flow. The intake enclosures also include the activated carbon absorption material, providing the same function as the stock configuration without the significant restriction to air flow. The Dinan air boxes are completely sealed enclosures, virtually eliminating the pressure drop measured with the stock units. The sealed enclosures also insulate against power-robbing heated air under the hood for maximum power output.

The Dinan High Flow Air Mass Meters are included, providing a full 22% increase in air flow.

The carbon fiber air box lids are both functional and a handsome addition to the engine compartment. The weave perfectly matches the Dinan front strut tower brace for a very tasteful high performance look.

3.91 Limited Slip Differential

3.91 Limited Slip Differential

Dinan lowers the stock 3.62 final drive ratio to a 3.91, taking full advantage of torque multiplication for a substantial 8% increase in torque delivered to the road. The improved acceleration comes with only a minor increase in engine speeds at cruise and no effective reduction in top speed potential.

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