If you look at the current technology available to the BMW
enthusiast; its clear that there are many Koni and Bilstein based
solutions for the damper and coilover customer. While these have
their place, all of these are based on decades old technology that
has its inherited limitations as mass produced products.
For those that love products that deliver outstanding performance,
and quality- with the understanding that these cost a bit more; we
are very happy to provide them with the JRZ RS1 damper kit.
Available for a growing list of high-end late model BMW chassis,
RS1 shocks and struts represent the latest technology developed
from professional racing dampers to offer this technology to the
enthusiast. RS1 however are the latest generation of tech, with
only a small cost premium over the common contenders. Read on to
find out why RS1s are such an exciting new product:
The most obvious improvement of what RS1 offer over the old
standards is absolutely amazing handling with terrific ride
quality. Not one or the other, but a both without compromise.
That means even with lower ride heights, higher spring rates, and
aggressive driving over uneven surfaces; the chassis is far more
composed than any typical mass produced shock, even over
rough pavement and on your favorite street road.
In their soft setting range, they offer ride that is typically as,
or more comfortable, and faster than even OEM on the street. For
the times when you wish to go to the track, you may quickly adjust
the suspension stiffer for smooth- high grip surfaces, and expect
sharp and athletic response suitable for a true track day car. NO
other suspension offers this level of adjustment to such a high
degree at the RS1!
Think of the JRZ as "having your cake, and eating it too"- truly
superior handling mixed with a compliant yet amazingly controlled
The RS Series offer the client consistent, durable, repeatable
results through quality materials and motorsports level
adjustability that nothing in this price range can touch. JRZ
worked for many years to develop a 'dual use' system that is
sensitive enough for those who have felt the suspension of a
competitive race car with shocks that can cost over 10k dollars,
but durable enough for a street car that can see every day use if
the owner wishes.
JRZ's valving and wide range of adjustability allows for everything
from complaint street rates, around the 400 lbs. range all the way
up to rates typically found on dedicated track machines in the
800-1000 lbs. without issue. Others adjustable dampers used
in lesser kits manage only about +/- 150lbs of range before there
valving is outside of ideal.
RS1 (NEW) (1 adjuster, dual compression and
rebound): allows the driver to adjust
ride with a single adjustment knob for the ease of use and cost
friendliness of a street car suspension. The RS1 system offers a
very wide range of adjustment, so weather your matching your
chassis to performance street rates and tires, or stiff
race-springs and R-compounds: the RS1 works fabulously!
Unlike 'budget minded' lines from other companies; each RS1 series
shock is a direct descendent of winning RS-Pro technology, with
high rigidity not found in other street-derived mono-tube
These are a truly motorsport derived product,
engineered from a high end solution to be more affordable- not
developed to meet a price point. This may be the last word in
easy-to-use adjustable suspension! (also available matched to
Eibach or H&R sport springs for an affordable, comfortable and
highly sporty street solution that is non-hight adjustable.)
RS1 Update: RS1 kits from VAC do not have the noise
issues that were part of the first batch sold. Buy with 100%
RS (2 adjuster, independent compression and rebound)
: an affordable
two-way solution that's dominant in BMW club racing. 2-way and
easily adjustable, with no external reservoirs. These systems meet
the needs of the dedicated club driver, or high end street car
street car that spends weekends at the track in a competitive
setting. Popular for a reason and highly sensitive to adjustment.
The RS's control of both compression and rebound
adjustment, independently. One can adjust the JRZ’s rebound without
The advantage of gas pressure is that it stops oil from foaming and
provides lifting force for the piston. No one else has figured out
how to build a seal that allows gas pressure in a true twin tube.
JRZ is the only one in the world that can do this. It’s something
they’ve learned at showroom stock racing, and their package now
gets this technology to the affordable road system or your track
RS-Pro (2 adjuster, independent compression and rebound w/
external reservoir): Allows the driver to adjust
compression and rebound, with the added heat dissipation and
reserve of an external reservoir. A favorite of exotic car
enthusiasts and often found on Porsches, Lamborghinis and Ferraris
that raced and driven hard by real enthusiasts, but can still keep
excellent street composure.
The RS-Pro system offers a very wide range of adjustment, so
weather your matching your chassis to performance street rates and
tires, or stiff race-springs and R-compounds: the RS-Pro works
High rigidity motorsport derived dampers deliver exceptional body
control for any street scenario or lap after lap of punishment.
As these are high end solution, there are details that you may
wish to discuss with a professional. We welcome your call or email
us for a no-pressure chat with one of our setup gurus.
-E9x/E8x (M3/1M) RS shown, along with JRZ
recommended Eibach main and tender springs + camber
[Default package, upgrades optional]
-(4) JRZ Dampers
-(4) Eibach ERS Springs
-(2) Rear Shock Mounts, Monoball type
-(4) Eibach ERS Linear Springs
-(2) Rear Spring Height Adjusters
-(2) Front strut sleeves (M3 & 1M)
-(2) Front Camber Plates (by Ground Control)
-(4) Tenders springs and (4) couplers
Complimentary add-on products:
Camber Plates: Required to use the RS series in a
coilover arrangement. Adding Ground Controls very high quality
camber plate set allows for more front camber or caster for sharp
turn it characteristics and high grip with very little-to no street
compromise. JRZ approved as well!
Tender Springs: Can add the positive qualities of sport
springs by capturing the linear rate springs and improving/quieting
ride over un-even surfaces. A popular upgrade at your
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