Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
Speedway Motors Logo
America's Oldest Speed Shop ®

Search

Canadian Leaf

AFCO 3870R-1 Eliminator Double Adjustable Rear Shock, 7 Inch, Chevy/GM

SAME DAY SHIPPING! Order within the next 14 hours 5 minutes and receive same day shipping

AFCO 3870R-1 Eliminator Double Adjustable Rear Shock, 7 Inch, Chevy/GM
AFCO 3870R-1 Eliminator Double Adjustable Rear Shock, 7 Inch, Chevy/GM

Click image to enlarge

Speeday Motors Logo
X
AFCO 3870R-1 Eliminator Double Adjustable Rear Shock, 7 Inch, Chevy/GM

Details

Reviews

Q & A

What's in the Box

AFCO Eliminator Twin Tube Adjustable REAR shocks are built specifically for drag racing. Using advanced onboard diagnostics, AFCO developed the Eliminator Series to precisely control your race car at every point on the track. With the easy-to-use, repeatable "click" settings, this shock will give you unsurpassed traction.

By allowing full control over both compression and rebound forces, Double Adjustable shocks give the tuner the ability to fine tune every aspect of the chassis movement to provide the ultimate in acceleration control and overall driveability.

  • 106-3875R1
    • Body Mount:  Tie Bar with 2.375" bolt centers
    • Shaft Mount:  1/2" I.D. bearing (1.06")

Fits most '55-'96 GM chassis - see Applications tab for fittment.

Application

Warning - The chart below is a general guide only. We highly recommend you measure your chassis for proper length and mount points before ordering.

How to Choose Shock Length (GIF)

  • '82-'96 Blazer/S-10*  -  Part # 1063875R1 
  • '68-'87 El Camino*  -  Part # 1063875R1
  • '64-'67 El Camino*  -  Part # 1063875R1
  • '68-'83 Chevelle/Malibu*  -  Part # 1063875R1
  • '64-'67 Chevelle/Malibu*  -  Part # 1063875R1
  • '73 Nova Non - H.D. Rear  -  Part # 1063875F (same as '93-'02 Camaro FRONT - mounting point mods may be needed)
  • '73 Nova With H.D. Rear*  -  Part # 1063875R1
  • '68-'72 Nova W/ Mono-leaf"  -  Part # 1063875R1
  • '68-'72 Nova W/ Multi-leaf*  -  Part # 1063875R1
  • '65-'86 Fullsize*  -  Part # 1063875R1
  • '55-'57 Fullsize*  -  Part # 1063875R1
  • '70-'88 Monte Carlo*  -  Part # 1063875R1
  • '75-'80 Monza"  -  Part # 1063875R1
  • '72-'77 Vega"  -  Part # 1063875R1
  • Shock also fits all Buick, Oldsmobile, and Pontiac equivalents.

(*) May need to "slot" tie bar mount.

(") Check extended and compressed dimensions.

Notes

  1. The rebound adjustment is the most critical in tuning a drag racing set-up. This adjustment allows the tuner to dial in the "un-loading action" of the chassis and keep the tires planted during the critical first 60' down the track.
  2. Double adjustable shocks are the ultimate tool in the chassis tuner's arsenal. The double adjustments of both compression and rebound dampening are completely independent - changing the setting of one has no effect on the setting of the other.
  3. Can be used as a coil-over shock with 106-20135D coil-over hardware kit (purchase separate).
  • Lightweight aluminum construction also helps dissipate heat
  • Rebound settings are adjusted via a shaft-mounted knob with 32 clicks
  • Compression settings are adjusted via a body-mounted know with 32 clicks
  • Smooth, Ultra Low Friction rod guide
  • Low resistance allows internals to function to their fullest potential
  • Almost no "stiction" to interfere with putting the power down
  • Coil-over Ready w/ purchase of kit 106-20135D

Item Details

Double Adjustable
13.90" Comp, 20.90" Ext

You may also be interested in:

AFCO Yellow 2-5/8 I.D. Coil-Over Springs, 4 Inch
                        

There's a lot riding on your springs-literally. Springs are your car's connection to the ground, and their performance is directly related to all other suspension components. Inconsistent, weak springs can cause a multitude of handling problems, and in some cases, dangerous situations. When it comes to choosing coil springs there are many alternatives, but if you want the best you can get, the choice is clear: choose Afcoils. 

All Afcoils carry a lifetime warranty to remain within 2% of the original nominal free height. Choose your length and rate. 

  • Machine-ground on both ends to tolerances within 1 degree
  • Pressed to solid height and "pre-set" - eliminates potential for additional set
  • Optimized material thickness and coil spacing
  • Made of super-high tensile strength chrome silicon wire for long life and and a consistent rate
  • All springs are cold wound on the latest automated coiling equipment and heat treated twice during manufacturing to be able to withstand even the most abusive conditions
  • To further enhance durability, Afcoils are shot-peened and coated with a durable yellow finish

Afcoil Spring Rate Guide (GIF)

AFCO 6875R-1 6875R-1 Reactor Rear Drag Shock, Chevy/GM, 7 Inch Stroke
                        

AFCO Single Adjustable Monotube REAR shocks are an economical alternative to the fully double adjustable design. The single adjustable gives you the ability to adjust rebound dampening control without affecting the compression dampening characteristics of the shock.

  • Body Mount:  Tie Bar with 2.375" bolt centers
  • Shaft Mount:  1/2" I.D. bearing (1.06")
  • Quicker R.T.'s
  • Gas Mono-tube design for superior tuning and performance
  • Rebound adjustable only - will not bleed over to compression
  • Can be upgraded to a coil-over shock
  • 100% co-Tested and Serial Numbered
  1. The rebound adjustment is the most critical in tuning a drag racing set-up. This adjustment allows the tuner to dial in the "un-loading action" of the chassis and keep the tires planted during the critical first 60' down the track.
  2. Can be used as a coil-over shock with 106-20135D coil-over hardware kit (purchase separate).

Fits most '55-'96 GM chassis - see Applications tab for fittment.

AFCO 3870R Eliminator Rear Double Adj. Shock, 7 In Stroke-Ford/Mercury
                        

AFCO Eliminator Twin Tube Adjustable REAR shocks are built specifically for drag racing. Using advanced onboard diagnostics, AFCO developed the Eliminator Series to precisely control your race car at every point on the track. With the easy-to-use, repeatable "click" settings, this shock will give you unsurpassed traction.

By allowing full control over both compression and rebound forces, Double Adjustable shocks give the tuner the ability to fine tune every aspect of the chassis movement to provide the ultimate in acceleration control and overall driveability. 

  • Body Mount:  Tie Bar Mount w/ 2.375" bolt centers
  • Shaft Mount:  9/16" Stud (3-1/8" length, 1-1/8" threads, 1-3/4" washers)

See Applications tab for Ford-Mercury chassis fittment.

AFCO 3875R-1 Eliminator Rear Shock-7 Inch, Bearing Shaft, Chevrolet/GM
                        

AFCO Eliminator Twin Tube Adjustable REAR shocks are built specifically for drag racing. Using advanced onboard diagnostics, AFCO developed the Eliminator Series to precisely control your race car at every point on the track. With the easy-to-use, repeatable "click" settings, this shock will give you unsurpassed traction.

Single (Rebound) Adjustable shocks are an economical alternative that gives you the ability to adjust rebound dampening control without affecting the compression dampening characteristics of the shock.

  • 106-3875R1
    • Body Mount:  Tie Bar with 2.375" bolt centers
    • Shaft Mount:  1/2" I.D. bearing (1.06")

Fits most '55-'96 GM chassis - see Applications tab for fittment.

AFCO 3870R-2 Eliminator Adj. Rear Shock 7 In, Chevy/GM, 1970-81 Camaro
                        

AFCO Eliminator Twin Tube Adjustable REAR shocks are built specifically for drag racing. Using advanced onboard diagnostics, AFCO developed the Eliminator Series to precisely control your race car at every point on the track. With the easy-to-use, repeatable "click" settings, this shock will give you unsurpassed traction.

By allowing full control over both compression and rebound forces, Double Adjustable shocks give the tuner the ability to fine tune every aspect of the chassis movement to provide the ultimate in acceleration control and overall driveability.

  • 106-3875R2
    • Body Mount:  Tie Bar with 2.375" bolt centers
    • Shaft Mount:  9/16" Stud (3-1/8" length, 1-1/8" threads, 1-3/4" washers)
  • Lightweight aluminum construction also helps dissipate heat
  • Rebound settings are adjusted via a shaft-mounted knob with 32 clicks
  • Compression settings are adjusted via a body-mounted know with 32 clicks
  • Smooth, Ultra Low Friction rod guide
  • Low resistance allows internals to function to their fullest potential
  • Almost no "stiction" to interfere with putting the power down
  • Coil-over Ready w/ purchase of kit 106-20135D

See Applications tab for fittment.

AFCO 20135D Drag Shock Hardware, Coil-Over Kit (Mounts Spring to Shock)
                        Replacement parts and hardware for AFCO Drag Series coilover shocks.