The life of an exhaust system
The first step to a suspension upgrade often starts out with replacing the springs. Replacing your stock springs with performance springs can enhance your driving experience in many ways. They can reduce the visual tire-to-wheelwell gap to give the vehicle a more lowered aesthetically pleasing look; also increasing the spring rates and as well as lower the vehicle's center of gravity, improving the vehicle's handling and responsiveness.
By lowering the center of gravity of the car, it greatly reduces acceleration squat. This is when the back of your car is pushed down during acceleration. When the back is pushed down, the front is forced up, which means it is resisting oncoming airflow and that compromises acceleration and aerodynamics. Spring manufacturers tend to offer a variation of springs with varying lowering lengths and spring rates to accommodate different needs, usually between comfort and performance. In Eibach's case, they came out with the Pro Kit Performance springs and the Sportline Performance springs.
The Eibach Pro Kit Springs are catered for everyday street performance while the Eibach Sportline Springs are for those who expect greater sports performance. The main difference between the Pro Kit and the Sportline is that the Pro Kit lowers up to 40mm whilst the Sportline can lower up to 50mm.
Lowering Front(approximately) - 30 mm
Lowering Rear(approximately) - 25 mm
Lowering Front(approximately) - 45-50 mm
Lowering Rear (approximately) - 35 mm
The Pro Kit is able to lower your vehicle enough to reduce the wheel-well gap and while it uses progressive spring rates, they are designed with higher than stock spring rates to provide a good balance between comfort and cornering performance. The Sportline on the other hand, is coupled with an aggressive spring rate for more aggressive driving and improved handling.
There might also be a noticeable difference in comfort levels, as the Pro Kit is not as aggressive in spring rate or drop rate, this maintains your ride quality more than the Sportline, which lowers your vehicle significantly lower than the Pro Kit which requires higher spring rates to keep the car from bottoming out and this naturally compromises the smoothness of your ride but results in greater handling pleasure.
With that said, the Pro Kit and Sportline do share a few things in common. They both have progressive spring designs, lowers the center of gravity of your car and both has Eibach's standard million-mile warranty.
The Eibach Pro Kit Springs are designed to work perfectly with stock absorbers however they can be used with OEM shocks as well but with a lot of precaution as this depends on the condition of your shocks. If they are too weak and of high mileage, it is recommended to be replaced together.
The Eibach Sportline Springs can also be used OEM shock absorbers as long as they are in good quality but it is also recommended for them to be replaced to handle the extra amount of lowering as well as stiffer springs as a sudden change in stiffness of the springs can wear out your shocks prematurely. Stock shock absorbers are not as recommended as they may not be able to match the spring rate and reduction in travel from the Sportline.
Eibach has made it easy for drivers who wish to replace both their springs and shocks by teaming up with Bilstein to create the B12 Pro Kit and B12 Sportline Kit which includes the respective springs along with B12 Bilstein shock absorbers as a cohesive set. Click HERE to find out more about the B12 kits.
The choice between the Eibach Pro Kit Springs and the Eibach Sportline Springs entirely depends on your driving needs and preference. Are you looking at simply aesthetics? Are you looking for practicality or performance? These are questions you should have the answer for to be able to decide between the two. It all depends on the ride quality and handling you want.
If keeping the comfort level is a priority for you and you want a decent lowered look, the Pro-Kit is the one for you. But if you're looking at something more performance suited, even more lowering and do not mind a performance based ride quality, then a set of Sportline might be more suitable for you.
Price Comparison (Estimated before GST)
B12 Pro Kit
Rough estimation to install lowering springs at a local singapore workshop is about S$180-S$360 nett
All the items mentioned above are available on https://www.bmwpartsco.com for order. If you have any questions or require help with looking for the suitable parts, feel free to drop us a text on Whatsapp @ +6597883616
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