Engine Performance

Performance Engine Software
2 badge points

Dinan Performance Engine Software extracts additional power as well as speeding up throttle response. The software safely raises the rev-limiter by 250 rpm, enabling you to carry more road speed in each gear as well as optimize shift points for maximum acceleration. The top speed governor is removed, enabling the cars to reach their natural top speed. Additional stages of Dinan Engine Software are available, calibrated for use with specific combination's of the other Dinan engine products in order to ensure optimum performance, reliability and drivability.

545: +8 hp @ 6600 rpm / +6 lb-ft of torque @ 6600 rpm
550: +8 hp @ 6500 rpm / +6 lb-ft of torque @ 6500 rpm

*Dyno results when tested in conjunction with a K&N free flow filter.

High Flow Air Intake System - 545, 550
3 badge points

This system takes full advantage of the Ram-Air effect by adding a second inlet that force-feeds more cool, oxygen rich air into the engine. The system features an enhanced replacement air box and cover that increase total volume as well as accommodate the additional air inlet and larger high flow filter element. The 550 system also includes a replacement air mass meter housing and adapter. Matching Stage 2 Engine Software is highly recommended for optimum performance and drivability.

545: +17 hp @ 6500 rpm / +14 lb-ft of torque @ 6500 rpm
550: +18 hp @ 6500 rpm / +15 lb-ft of torque @ 6500 rpm

High Flow Air Mass Meter Housing
2 badge points

Dinan's High Flow Air Mass Meter Housing features a larger internal diameter, further improving the delivery of air to the engine for maximum output. The Air Mass Meter is available for both the 545 and 550, for use in conjunction with the High Flow Intake Systems. Matching Stage 4 Engine Software ensures optimum performance and drivability.

Free Flow Exhaust
3 badge points

100% 304 Stainless Steel, a great sporty exhaust note and superior flow make for the best performing 5 Series. It also has polished stainless steel tips which give your car a tasteful high performance look unlike any other. Careful attention to detail ensures a perfect fit using the factory hangers.

545: +6 hp @ 6600 rpm / +5 lb-ft of torque @ 6600 rpm
328: +6 hp @ 6500 rpm / +5 lb-ft of torque @ 6500 rpm

High Flow Throttle Body
2 badge points

Dinan carefully bores the stock throttle body, increasing the internal diameter for greater air-flow area. The larger bore further improves air-flow for increased power output and more immediate throttle response. Matching Stage 3 Engine Software is recommended for optimum performance and drivability.

545: +5 hp @ 6500 rpm / +4 lb-ft of torque @ 5500 rpm
550: +4 hp @ 6500 rpm / +3 lb-ft of torque @ 6100 rpm

Suspension and Chassis

Carbon Fiber Front Strut Tower Brace
2 badge points

Dinan's strong yet lightweight carbon fiber front strut tower brace effectively enhances chassis rigidity for improved handling and sharper steering response. Forged aluminum ends ensure maximum strength and bolt directly to the stock locations for a clean and simple installation. May be installed with any Dinan suspension system or the stock components.

Carbon Fiber Rear Shock Tower Brace
1 badge points

The matching carbon fiber shock tower brace provides increased chassis rigidity at the rear of the car, further improving the 5 Series' handling capabilities. Made from the same tubular carbon fiber as the front brace with forged aluminum ends for maximum strength.

19" Lightweight Forged Wheels
5 badge points - Set of four

Dinan 19x9" front and 19x10" rear wheels accommodate the largest tires possible 275/30-19 in the rear and 245/30-19 in the front, increasing grip as well as reducing under steer for razor sharp turn-in. These wheels are the lightest 19" wheel you will ever find at only 20 pounds each.

Suspension Systems
5 badge points

Dinan suspension systems offer the grip that enthusiasts demand while maintaining a comfortable, well-dampened ride. Comprised of fully matched proprietary springs, Koni adjustable shocks/struts, Diana's unique front and rear Roll Control Systems and camber plates, the systems provide comprehensive, pre-tuned suspension solutions that take the guesswork out of superior handling from the Series without compromising civilized ride quality.

Stage 1 Suspension: Performance Spring Set, Adjustable Koni Struts/Shocks, Matching Bump Stops.
Stage 2 Suspension: Adds front and rear Roll Control Systems to Stage 1 components for cars equipped with "Dynamic Drive", providing greater control over body roll while retaining the stock antiroll bars and self adjusting feature. The rear Roll Control System also provides adjustability for a closer to neutral balance.
Stage 3 Suspension: Adds Front Camber Plates to the Stage 2 components, including 1/2 degree additional negative camber for greater grip in the turns, reducing understeer and providing razor sharp turn-in. Camber plates may be installed with the Stage 1 System for cars that are not equipped with the "Dynamic Drive" self adjusting antiroll bars.

Mono Ball Lower Control Arm Bearings
1 badge points

Mono Ball lower control arm bearings address the excessive deflection associated with the stock bushings that negatively affect steering response as well as exacerbating the effects of brake shimmy, which can be particularly noticeable when larger brakes are installed. Ride quality is also improved as the mono ball bearing are actually more compliant. Featuring racing quality, spherical bearing in precision machined aluminum housings, the bearings are substantially larger than competing products for greater load handling capabilities and durability.

Dinan Performance Brakes by Brembo
3 badge points

Dinan and Brembo, the world leader in high performance brake systems, offer ultimate stopping power while maintaining the quiet operation, pedal feel and wear indicator systems that are appropriate for street applications. For the 5 Series, the front brakes feature impressive 4-piston aluminum calipers with 380mm two piece rotors (stock rotors: 348mm). The rear brakes feature 4-piston calipers as well with 345mm two piece rotors (stock rotors: 345mm). The systems also include Goodridge stainless steel brake lines. Kits are available for all four wheels or the front only in your choice of black or red calipers and slotted or drilled rotors.

Driveline

Lightweight Flywheel (Manual and SMG Transmissions)
2 badge points

Lightened dual-mass flywheel improves driveline efficiency for faster acceleration and more immediate throttle response. The flywheel has been relieved of 7 lbs. for an 18% reduction in weight and a 40% reduction in rotational inertia. SMG equipped cars receive the added benefit of a reduction in shifting time, providing smoother gear changes in both the manual and "automatic" modes.

3.45 Differential (Manual and SMG Transmissions)
2 badge points

Lowers the stock 2.93 final drive ratio for a substantial 17.7% increase in torque delivered to the wheels. Provides faster acceleration in every gear with only a minor increase in engine speed at cruise.

Accessories

Dinan Pedal Pads
1 badge point

Stylish spun aluminum pedal pads with anti-slip rubber inserts feature the Dinan logo. Available for manual, SMG and Automatic applications.

Signature Floor Mats

Signature floor-mat sets featuring an embroidered Dinan Logo are available for your 3 Series in your choice of carpet and logo colors.

The Dinan Badge

The Dinan Badge cannot be purchased but rather is provided at no charge when your Dinan performance selections total 10 points, making your Dinan enhanced BMW as exclusive as it is exciting to drive.

Dinan Signature Series

Dinan S-545 and 550

Includes: Stage 2 Engine Software; Free Flow Exhaust; Front Strut Tower Brace; Dinan Pedals; Dinan Deck-lid Badge and Serial Numbered Dinan S Plaque.

Dinan S-545: 349 hp @6500 rpm / 343 lb-ft of torque @ 4000 rpm
Dinan S-550: 385 hp @6500 rpm / 374 lb-ft of torque @ 4000 rpm

Dinan S1-545 and 550

Dinan S1-545: 354 hp @6500 rpm / 346 lb-ft of torque @ 4000 rpm
Dinan S1-550: 390 hp @6500 rpm / 374 lb-ft of torque @ 4000 rpm

Dinan S2-545 and 550

Dinan S2-545: 354 hp @6500 rpm / 346 lb-ft of torque @ 4000 rpm
Dinan S2-550: 390 hp @6500 rpm / 374 lb-ft of torque @ 4000 rpm