Slightly used JRZ RS1 off of my 1M. Less than 3K miles and just got them back from a full service/inspection by JRZ so they are basically new. I will include the bump stops, which I sue as secondary springs at no additional charge. The price is for dampers only, which retail new at $2499.
http://www.hpashop.com/JRZ-RS1-Singl...JRZ-1M-RS1.htm
Adding springs, rear height adjusters and camber plates will add $1360 on top of the dampers. Alternatively, you can also source the above components on your own.
My review on these:
http://www.1addicts.com/forums/showt...&highlight=jrz
Product description from JRZ:
JRZ Suspension Engineering is proud to introduce the JRZ RS1, a revolutionary development in multipurpose high performance damping.
Applying our race winning technology, JRZ designed the JRZ RS1 to give ultimate comfort for public roads and precise chassis control when driving on track.
The JRZ RS1 is a high gas pressure, single adjustable monotube damper. The canister has been designed inside of the damper.
JRZ inner canister technology gives the advantages of monotube canister dampers without the mounting concerns and complexity.
Easy to install, the JRZ 1M M3 RS1 is available as a complete kit with mounting hardware and springs for all applications we support.
Built on the same production line and sharing components with our pro racing applications, the JRZ RS1 is of true professional heritage.
Following JRZs design philosophy, the JRZ RS1 has a large 22mm diameter piston rod in strut applications and a 16mm diameter piston rod in aluminium damper applications.
The large piston rod magnifies the high pressure gas charge which means great chassis control without using a high spring rate or increasing harshness.
Utilizing a mono tube design with a high flow piston ensures the smoothest possible ride in normal conditions while the bleed adjustment gives the ability to tune for racing situations.
Unlike many other single adjustable suspensions, damping balance is carefully maintained between compression and rebound. This damping balance is critical to maintaining tire contact with the road in addition to controlling the main mass of the vehicle.
To satisfy the diverse needs of each drivers application, the JRZ RS1 has an extra large adjustment range.
With a few clicks you can turn your smooth street car into a crisp, rock solid track car in seconds.
Features
22 mm rod strut, 16 mm rod damper
24 clicks of rebound
Adjustable gas pressure, mono tube
Piston designed for high performance
Large adjustment range
JRZ has designed the JRZ RS1 to give the end user the best possible damper to drive daily, while maintaining the racetrack performance that wins championships.
The JRZ RS1 is shipped as a bolt-on kit and always comes with the personal support JRZ is known for.
Using the best materials, coatings and aerospace standard manufacturing processes as in our motorsport line; the JRZ RS1 is designed to perform flawlessly.
Adjustment is easy to perform and comes with the knowledge base only JRZ provides to his customers.
Benefits
Easy to use and bolt-in
Street ride, racing performance
Extra long product life
One adjustment for complete control of ride and handling
Professional racing quality
Recommended applications
Daily driving
Drivers education (DE) events and track days
Club racing