05-07 Subaru STI BC Racing Coilovers - ER Type
Estimated Build Time: Built to order. Ships in 3-4 Weeks
Part Number: F-03-ER
ER Series Features:
- Externally mounted reservoir
- Dual piston design (1 in reservoir, 1 in shock)
- 30 levels of damping force adjustment
- Dual piston design
- Separately adjustable compression & rebound settings
- Separate full length height adjustable
- Pillowball front and rear mounts included
- Front camber plates included (where applicable)
- Adjustable rear camber plates sold separately (where applicable)
- One year warranty
An external reservoir for a coilover can serve many key features when taking your car to the track. One of the main features would be the fact that there is much more oil capacity present. With the external reservoir in place, there is an extra compartment to store fluids. This provides a significant increase in oil capacity, which will take longer for all of it to heat up. This better distributes the heat that the strut will make when in full operation. This will also lower the peak temperature that the oil will reach and permits it to be run longer before overheating. When oil heats up, it changes in viscosity and effects how efficiently it can function due to a variation in damper rates. Controlling the oil temperature can directly relate to controlling the damper consistency. More damper consistency will improve handling on road and track applications while being much more predictable.
Damper Adjustment w/ Dual Piston Design:
The ER Series Coilover is a perfect solution for those who drive their vehicle on the track often and want the most out of their suspension. The 30 way damping system on the coilovers feature a separate knob for both compression and rebound. This is possible due to the external reservoir and dual piston design. The strut body itself houses a piston and enables rebound adjustment at the top of the strut. In the reservoir is another piston that allows for adjustment of compression. This feature is for the drivers that want to dial in their exact needs. Compression damping allows you to adjust how the car's weight rolls onto its front tires under braking while the rebound damping allows you to adjust how the car responds as you come off the brakes. Being able to finely tune your compression/rebound settings can aid in being able to get on the power sooner out of a corner and maximize corner exit speed for the next straight.
The height on the strut is separately adjustable for a customizable ride height to your own liking. This means no preset ride height and you get to choose how high or low you want it. Choose to adjust your height to near stock, or drop it down to the ground. The patented concave lower locking ring helps keep your ride height adjustments locked in and prevents any unwanted adjustment changes. Because of the separate adjustment for height, your strut travel will remain the same no matter your ride height. This effectively keeps the performance at it's highest level regardless of your preference of height.
I just installed a set of BC-ER coils in my 2006 STI with the addition of swift springs. I could go on and on for thousands of words of praise to this company but I won't. We'll make this simple. I love the coils. They handle better than my old ones did and they ride alot more comfortable. They were very expensive but over all it is absolutely worth saving up some money and getting some high end coils for your car. Thank you BCracing for making such a good product and getting it to me in such a short time line.