AST Coilover kits: 4100 & 4200 series -NEW LOWER PRICES- ApexRaceParts.com //APEX\\
ApexRaceParts.com is an official, Authorized AST Suspension dealer, and we carry their full BMW suspension line on our website for easy checkout with prices listed and free shipping.
Contact us if you have any specific fitment questions via PM, e-mail or phone (press 0 when calling to be directly transfered to me).
AST officially announces new pricing on complete 4100 and 4200 kits which include shocks, struts, springs, ride height adjusters and other hardware. As of April 1st, prices have dropped from $2549 to $1899 for a complete 4100 kit and from $3329 to $2899 for a complete 4200 kit.
APEX’s NEW 4100 kit price: $1849 plus FREE shipping
Click HERE to order
APEX's NEW 4200 kit price: $2849 plus FREE shipping
Click HERE to order
APEX's NEW 5100 kit price: $2779 plus FREE shipping
Can be upgraded to 5200 or 5300 on the product page
Click HERE to order
4100 SERIES SINGLE ADJUSTABLES
The 4100 Series shocks introduce high performance monotube technology at prices competitive with twin tube insert coilover kits.
They include purpose built strut and shock bodies, shortened from stock lengths.
They are single adjustable (rebound only) and can be custom valved for your application.
4100s use the same internals as our 4300 Competition shocks.
APEX Price: $1849
4200 SERIES DOUBLE ADJUSTABLES
The 4200 Series shocks use AST’s Twin Piston Dual Adjust (TPDA) technology.
Similar non adjustable versions have been found in the highest forms of racing.
TPDA builds on this technology to allow for 2 adjustment knobs to be mounted on the shock body (no tools required).
Quick rebound and compression changes can be made in the pits in seconds.
4200s are fully customizable and rebuildable.
APEX Price: $2849
5000 SERIES INVERTED ADJUSTABLES
Single, Double & Triple Adjustable versions
5000 series: These are an inverted strut design, which makes for a very stiff strut assembly, providing better suspension geometry under heavy lateral and braking loads seen in a road course environment.
They are available in single, double, and triple adjustable versions, and can be modularly upgraded from the base 5100 series to the 5200 or 5300 by simply purchasing the external reservoir attachment.
This provides an upgrade path for customers on a tight budget.
APEX Price: $2779
Why Buy AST USA Shocks - The Four P’s
Besides tires, SHOCK ABSORBERS are the most important parts on your car.
They need to be perfectly matched to your springs, your driving style, and your car overall.
AST PREMIUM SHOCK ABSORBERS offer superior performance in FOUR CRITICAL AREAS:
• Piston size
Before AST, there were constant compromises when shopping for shocks.
When you choose AST USA, you can have the best in all four areas and create a performance oriented package that you know you deserve.
Consider what you get with AST products and the value for your money becomes self evident.
All levels of AST shock absorber are hand built using brand new, custom housings.
Even with the Performance Grade 4100 series, you are getting the internals of the 3 way shocks in a single adjustable (rebound only) coilover kit.
Competitiors at or below AST prices simply do not offer the same high technology and features.
AST shocks are monotube design for a reason; they perform better. When will you notice this?
Big bumps in turns and fast transitions on the track / autocross course are where true premium shock performance becomes evident.
Ride in or drive any car with this level of shock and you’ll know instantly why people buy them, they make the difference.
Other non-monotube designs on the market exist for two reasons: comfort and cheaper manfacturing expense.
These are two things can do without when time on the track counts!
AST's monotube design translates into a bigger piston.
When you put AST shocks on your car, you know that those big pistons can handle much larger loads.
This translates directly into the ability to fine tune your shock.
Other shocks that use twin tubes have much smaller pistons; and that means less ability to handle performance loads and less flexibility when it comes to adjustments.
All of our shocks are pressurized to a minimum of 175 psi with nitrogen.
High pressurization keeps the oil from cavitating around the AST piston.
Cavitation makes the shock ineffective, pressurization makes a consistent environment for the shock to do its job correctly with every stroke.
Other lesser products (and even some more expensive ones) say they are pressurized, but they may be only
14 -29 psi - not something you need on your mind when approaching the next curve.
When you choose AST, you know that with each and every bump and hard corner, your shocks will be there to meet the challenge with superior design, pressurization, and value.
We've done a little homepage revamp to show off our new ast promotions
Do you have applications for the Z4M? I spoke to AST directly a while back and they indicated that they have a kit.
Thanks for any info!
FYI E46 owners: We have one 4100 kit left where we can offer free custom spring rates at the standard price (due to being kits from pre April inventory). That's a $299 savings on top of the already low price
Wished this price was offered last year before I got my Bilstein. :cry:
Oh my gawd. The prices dropped :excited:
I'm so getting these on my next car
PM me with any questions you have about fitment or application.
Ugh, I can't believe I sold my 4100s. So stupid.
What are AST setups made out of? Are they stainless so they can handle harsh northern winter conditions? What kind of warranty are on the components as well?
All struts are produced using high grade steel as opposed to aluminum, stainless steel and other materials. Steel is by far the strongest, most durable material for this application. AST then coats each body in a process called "KTL" in Europe. This process is not common in North America but is often referred to as cataphoretic dip painting. Dipping the part into a bath all but guarantees complete, even coverage. This provides the best protection against corrosion. This process far exceeds OEM standards on corrosion and is extremely tough.
AST provides a 12 month warranty of the 4100 series kits. These are race oriented kits even though many of them are fully TUV certified. Because of their race nature, customers tend to run them in extreme applications that far exceed the stresses other kits put up with that offer longer warranty periods, not to mention uses that would normally be considered void.
^1 year warranty!?!?! AWESOME! i wasn't expecting any with a race kit.
I ordered a set of 4100s w/ vorshlag camber plates and extended rear adjusting cables and had them installed less than a week ago.
Lets just say... I love it to death.
We have another 4100 E46 kit available that can be purchased with custom spring rates at no additional cost. This kit is not listed on the site. Contact me if you're interested.
PM me with any questions.
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