This topic is linked from:
BRZ/FR-S Suspension Options List (Springs and Coilovers)
Product: Eibach Pro-Kit Lowering Springs
Front: claimed 1.0" vs actual 7/8" (rate: 3.6kg/mm)
Rear: claimed 1.0" vs actual 7/8" (rate: 4.9kg/mm)
Part No: 8210.5.140
MSRP: $359
Manufacturer Link
Lowering Spring Installation DIY
I have had the Eibach Pro-Kit on my FR-S for about a week now, with over 200 miles of spirited driving on the street and in the mountains. I am extremely happy with this product as it simply improves the driver's experience with a slightly stronger connection to the road without being overly harsh.
The drop is advertised as a 1.0" front and rear, although my 2013 FR-S was only lowered 7/8" evenly at all four corners. That is close to an inch, but with the car riding so high to start off with I wish that the error would have been in the other direction. The new look simply removes the unsightly wheel gap that plagues the Scion. The front spring rate is increased by 56% (3.6kg/mm vs 2.7kg/mm stock) and the rear by 29% (4.9kg/mm vs 3.8kg/mm stock) and although this sounds a little extreme, some coilover kits have four times the stiffness of the stock springs.
These springs aren't harsh. Road feel is improved, but I don't cringe when I see a ripple, pothole or driveway. The car has a tendency to bounce just a bit more under aggressive driving on extremely rough surfaces, though, and I would definitely recommend upgrading the dampers (shocks) as a complimentary modification if you plan to take driving seriously. Around town you could easily live with the stock shocks (until they die, possibly)
I would recommend these springs for the BRZ/FR-S owner who simply wants to remove the 4WD look of the car without resorting to any extreme measures. The Eibach brand is an industry staple and customer satisfaction is high. This is a safe bet at a good price.
Front Spring comparison with stock on top and Eibach Pro-Kit on bottom
Rear spring comparison with Eibach Pro-Kit on top and stock on bottom
