Fitment Information Honda Civic (2006, 2007, 2008, 2009, 2010, 2011) Fits all trims, including SI Specs & Features Note: Image is only a representation of the coilovers.  TEIN doesn't have vehicle specific images.  Your coilover will be specific to your vehicle. Street Basis Z: 06-11 Non-SI Sedan Front Drop: 0.1" - 2.2", Rear Drop: 0.8" - 1.7" 06-11 Non-SI Coupe Front Drop: 0.5" - 2.6", Rear Drop: 0.8" - 2.5" 06-11 SI Coupe & Sedan Front Drop: 0.9" - 3.0", Rear Drop: 0.3" - 1.9" Spring Rates: 336 lb front and 392 lb rear Requires the reuse of OEM upper mounts Fixed Damper Settings (non adjustable) Street Advance Z: 06-11 non-SI Sedan Front Drop: 0.1" - 2.2", Rear Drop: 0.2" - 1.7" 06-11 Non-SI Coupe Front Drop: 0.5" - 2.6", Rear Drop: 0" - 1.5" 06-11 SI Coupe & Sedan Front Drop: 0.9" - 3.0", Rear Drop: 0.4" - 1.9" Spring Rates: 336 lb front and 392 lb rear Requires the reuse of OEM upper mounts 16 way adjustable damper settings Flex Z: 06-11 Non-SI Sedan Front Drop: 0.4" - 3.6", Rear Drop: 0.9" - 2.5" 06-11 Non-SI Coupe Front Drop: 0.2" - 3.8", Rear Drop: 0.6" - 2.1" 06-11 SI Coupe & Sedan Front Drop: 0" - 4.0", Rear Drop: 0.9" - 2.5" Spring Rates: 504 lb front and 560 lb rear Includes front & rear upper mounts (Front has camber plates) 16 way adjustable damper settings Genuine Tein 12 Month Warranty from Tein Product Description Street Basis Z: STREET BASIS Z is strictly a ride height adjustable kit. This makes it a perfect setup for the daily driver looking for an increase in handling performance without compromising comfort for everyday use. For many of you considering a lowering spring + performance shock absorber combination, the STREET BASIS Z makes even more sense as we select appropriate spring rates and valve our dampers to match. No guesswork on the end-users part in trying to match one brand of springs to another brand of shock absorbers. The added height adjustment feature allows the end-user the ability to adjust ride height to their preference, something that lowering springs lack. Being that most vehicles are slightly unbalanced from left to right sides, that means you can easily adjust the ride height so that each corner is even from their opposing sides.  TEIN Street Basis Z Coilovers are TEIN's entry level coilover that gives you all of the benefits of a high quality height adjustable coilover at an entry level price.  Street Advance Z: TEIN Street Advance Z coilovers are designed for those who want more performance from their coilover system.  Designed to provide a stiffer yet comfortable ride and aggressive stance, the street advance coilovers have 16 way adjustable settings giving you a much more noticeable feel in damping force change.  These coilovers provide plenty of shock travel even lower than standard vehicle ride height.  These coilovers adjust via an ultra strong ZT coated threaded sleeve and have updated internal components as well as external coating to dramatically increase durability and product life.  Excellent choice for daily driving, and great for weekend track use. Flex Z: TEIN Flex Z Coilovers are the latest in TEIN's generation of high end coilovers.  The difference with Flex Z is that you are getting a coilover that would normally cost almost double the price.  The new manufacturing systems that TEIN has put in place with this line of coilovers has allowed for them to produce these coilovers at a lower price and pass that savings on to you.   TEIN Flex Z has an awesome twin tube internal system that gives you one of the best street rides we've seen.  In addition, the full length height adjustment system enables you to lower the car to the max allowable level and still maintain the same shock travel and ride quality.  TEIN Flex Z is 16 way dampening adjustable (compression and rebound together) so you can made the ride stiffer or softer depending on what you are looking to achieve.  For example, you can set the dampening to a low setting for when you are daily driving the car and set it up to a stiffer/firmer setting for track or competition use.  TEIN Flex Z coilovers include upper mounts for each installation.  Includes a one year limited warranty from TEIN when purchased through an authorized dealer such as Redline360