Experience the Superior Performance of Swift Springs

Not all springs are made equal, and Swift Springs has invested years of expertise and research into perfecting the art of spring manufacturing. The result of their dedication is the innovative "HS5.TW" proprietary steel alloy, which sets a new standard in the world of springs. Swift Springs has successfully achieved several crucial objectives with this material, including:

• Consistently maintaining the spring rate throughout the stroke
• Offering the maximum possible stroke length
• Providing outstanding durability to prevent spring height loss
• Creating exceptionally lightweight springs

Founded in 1997, Swift Springs has built an impressive track record, catering to diverse applications ranging from oval track and dirt racing to the needs of enthusiastic street drivers. With a wealth of experience and a history of collaboration with world-class race teams and drivers, Swift Springs ensures they have the perfect spring to meet any demand.

The same ride height as the standard H&R Sport springs but with a stiffer spring rate geared even more towards track performance. Fits all 2008+ E90 M3 sedan and E92 M3 coupe, with AND without electronic dampening control (EDC).

After thousands of street and track miles in our own 2008 M3 sedan project car (the white car pictured), we loved the way the "standard" H&R Sport Springs felt on both the street and track. Since the ride was so compliant on the street (even with 20" wheels), we felt some M3 owners might want to sacrifice some of the street ride quality for an even firmer spring rate that would handle even BETTER on the track. We asked, and H&R delivered -- and the H&R Sport PLUS springs for the E9x M3 were the answer. The same "ideal" ride height with a more aggressive spring rate that is still tolerable on the street (though not as forgiving as the standard H&R Sport springs) and more at home on the track.

M3 with Stock BMW Suspension
Front Lowering 1.0"
Rear Lowering 0.6"

M3 with Competition Package
Front Lowering 0.75"
Rear Lowering 0.25"

This item fits the following BMWs:
2008-2011 E90 BMW M3
2008-2013 E92 BMW M3

Dinan Performance Springs are matched to your BMW's chassis and suspension components to deliver better handling and looks without sacrificing ride quality. Dinan BMW springs are carefully engineered to work within your car's suspension travel and to improve suspension geometry. Spring rates are slightly stiffer than stock and dialed in to reduce bodyroll. A stiffer suspension makes the car more fun to drive and the lower ride height improves the looks by reducing wheel-fender gap.

Dinan spring specs -

• F: -1/2" (12mm)
  
• R: 0" (0mm)

Fitment note: When used with stock shocks the Dinan Ride Quality Kit is strongly recommended. The Kit consists of shorter and stiffer bump stops and spring perches that work better with the lowered ride height of these springs. While not explicitly required, less than favorable ride quality and handling may result without them.

For over 35 years, Dinan has been America's premier tuning company, pioneering advancements in BMW modification while retaining a focus on balanced performance that preserves the original character and driving feel that a BMW offers. When you install a Dinan part on your car, know that it's not only carefully developed and tested, but that Dinan stands behind it with a four year, 50,000-mile warranty. Dinan believes so fully in their “total package” approach that once your car has been fitted with enough of their parts, they celebrate your conversion from stock to Dinan with an exclusive trunk badge, displayed proudly by BMW enthusiasts everywhere. The springs are worth 2 points towards your Dinan badge (Ride Quality Kit is worth 1 point).

This item fits the following BMWs:
2007-2013 E92 BMW 335i 335is 335xi - Coupe