Suspension Enhancement System Rear Kit

1980-1990 Chevrolet C70
$442.20 Sale
Out of Stock

Suspension Enhancement System Rear Kit

1980-1990 Chevrolet C70
$442.20 Sale
Out of Stock

Authorized dealer
Free shipping within the lower 48 United States
Brand new parts with warranty coverage
Free 30-day return and exchange on qualifying orders
Got Questions?
Our experts are here to help!

Product Details

Whether you want to upgrade, add a reservoir, or find something more affordable, contact us with any questions!

Part Numbers & Details

View full product specifications

Close specs
Part Numbers & Details
2 Rubber Springs
You'll be getting 2 hollow rubber springs & mounting hardware.
Timbren Lifetime Warranty
Timbren SES products come with a Lifetime Warranty which includes Defects in material and workmanship and Damaged parts under normal use and service.TIMBREN shall be entitled to make its owninspection to determine the validity of the claim. TIMBREN shall not be liable nor warranty the product in the event of alteration, misuse, overload, negligence or damage caused by others.
Important Fitment Note
All Necessary Hardware Included
Product Highlights
The enhancement system eliminates vehicle squatting & sagging and improves handling
Part NumberItemQuantity
GMRC70Suspension Enhancement System Rear1
Product Details

Each laser cut piece of steel is precision bent and powder-coated to ensure a quality fit. We’ve engineered our hollow rubber springs to deliver a progressive spring rate. In other words, the more weight that pushes down on the rubber springs the harder they work to prevent rear end sag. Whether you’re pulling a trailer or carrying a heavy load in the bed of your truck, our hollow rubber springs adjust automatically to keep the vehicle level at all times.This SES Suspension Upgrade replaces the jounce stop on the frame. Its unique design ensures superb ride quality – loaded or unloaded. (There should be a ½” to 1 ½” gap between rubber spring and axle to ensure unloaded ride quality.) Unlike other auxiliary spring systems, the SES Suspension Upgrade guarantees the best of both worlds.

Compatibility List

View warranty coverage

Close specs

What Products are Covered?

  • Timbren SES (Suspension Enhancement System) Kits and Active Off-Road Bumpstops Warranty: Warranted against defects in material and workmanship, under normal use and service for the life of the vehicle on which the kit was originally installed.
  • Axle-Less Trailer Suspensions Warranty: Three-year Limited warranty
  • Silent Ride Trailer Suspensions Warranty: Five-year Limited Warranty
  • Dakota Air Trailer Suspensions Warranty: Five-year Limited warranty on steel components; one year on other components including airbag and shock absorber.
  • STi Trailer Suspensions Warranty: Five-year limited warranty on steel components; one year on other components including torque rod assembly / spindle and air bag. 
  • Aeon™ Springs for OEM Customers: Timbren Aeon™ Rubber Springs are warranted against defects in material and workmanship for three years from date of purchase under normal use and service when used in a Timbren approved design.
  • Air Supply components are warranted against defects in material and workmanship for 30 days.


  1. The warranty is limited to the replacement of the failed part.
  2. The warranty does not include labor, freight, collateral damage or ancillary costs which may arise as a result of the failed part.
  3. Timbren retains the right to make its own inspection of the failed part to determine the validity of the claim.
  4. These warranties are non-transferrable.


  1. These warranties do not extend to and do not cover defects cause by:
    1. Any alteration, misuse, overload or negligence.
    2. Parts not manufactured by Timbren
    3. Normal wear and tear
    4. Addition of wheel spacers
    5. Improper alignment
    6. Improper Installation
    7. Unreasonable use
    8. Failure to provide reasonable and necessary maintenance
    9. Cosmetic finish or corrosion
    10. Improper torque values and torquing of wheel units
  1. These warranties exclude any incidental and consequential damages, including loss of time, inconvenience, loss of use, towing fees, telephone calls, cost of meals and lodging, for any breach of any express or implied warranty.
  2. Warranty on Timbren products will not apply if you purchased the Timbren products from an unauthorized dealer. You can find the list of authorized dealers at https://timbren.com. You can find the list of unauthorized dealers at https://timbren.com.

Exclusive Remedy

Timbren will, at its discretion, repair or replace the affected components of any defective product or repair or replace the entire defective product.

Shipping & Returns

Free shipping within the lower 48 United States

Close specs

FREE Shipping applies to all products shipped to the lower 48 United States, excluding truck freight items that exceed 100lbs or custom orders.

  • Leaf Springs, Axles, Long Travel Systems, and other products that get shipped on pallets will require specific shipping costs.
  • We do not ship truck-freight items out of the country, only to freight forwarders setup by the buyer.

All other shipping destinations that are available will be calculated at checkout, or you can contact us prior to your purchase.

Shock Surplus ships to the following destinations, and more:

  • All of North America
  • All of Europe
  • United Arab Emirates
  • Australia
  • Most Asian countries

Contact us for a free direct quote to your location.

30-Day Hassle-free Return & Exchange Policy - Stuff Happens!

We sell only brand new, never-installed, authentic, brand-name parts. If your order arrives damaged, is missing hardware, appears used or pre-installed, or is incomplete in any way, we will jump into action to send replacements. We can usually have replacements sent immediately for these rare cases of damaged, incomplete, or incorrect orders.

Shock Surplus allows returns and exchanges inside of a 30-day window starting from time of receipt by the customer. It is our mission to make every transaction smooth, and fix any issues you may encounter.

  • Products must be new, unused, and in uninstalled condition for us to accept a return.
  • We do not accept installed parts, so be sure you have the correct part number(s) before attempting to install them on your vehicle.
  • Returned parts must contain all associated hardware, otherwise that part number will be deducted from your refund.


No restocking fees. Our staff is on hand to make sure that your first purchase is exactly correct for your needs and vehicle, do not hesitate to contact us prior to your purchase through Live Chat or Email.

To start a return or exchange, please fill out THIS FORM (located at the bottom of the page), and be as specific as possible, and someone will be in touch with you in ~1 business day. The typical turnaround for a refund or exchange is 5-10 business days, depending on the complexity of the case. Exchanges are subject to availability of stock; any exchanges proving out of stock will be refunded to the customer.

Return Shipping Costs

We are available to make every transaction flawless for our customers, the Shock Surplus staff is available to guarantee fitment on every part we sell. Shipping costs responsibility are as follows:

  • Misboxed Item - Shock Surplus Responsibility
  • Incorrect Item Sent - Shock Surplus Responsibility
  • Incorrect Item Ordered - Customer Responsibility
  • Order Error (Address, Vehicle Fitment) - Customer Responsibility
  • Changed Mind - Customer Responsibility
  • Damaged in Transit - Shock Surplus Responsibility

Start Your Return Process

Returns Under Customer's Responsibility

  • Below 50lbs - $15 flat rate deducted from the refund. Shock Surplus will provide a shipping label to make this process as easy as possible.
  • Greater than 50lbs - Discounted shipping rates to get the product(s) back to Shock Surplus, that amount will be deducted from the refund. 50lb+ packages are automatically labeled 'Oversize' by our couriers, and automatically incur a $25 charge on top of the shipping fee.

Returns Under Shock Surplus' Responsibility

  • Free, we will provide a return shipping label and ship the replacement parts for free. If a refund is preferred, a full refund will occur.


You should expect to receive your refund within 5-7 business days of our warehouse receiving your return. The amount of time it takes for your refund to show up in your account varies by payment method, but typically takes 1-3 business days. You will also receive a message confirming the refund via the marketplace where the purchase happened. We wish we could speed up the process of funds reaching your payment method following a refund, but it is out of our hands.

If you need to return an item, simply login to your account (top right corner of the screen), view the order using the "Complete Orders" link under the My Account menu, and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item. You can also contact contact us for any return requests.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page.

International Orders

  • Orders are final, no returns
  • Orders shipped to a freight forwarder in the US, are eligible for return if the product has not left the United States.
  • It is the responsibility of the buyer and exporter to ensure correct items received before exporting. Shock Surplus is not responsible for items received once the freight forwarder has shipped the product.
  • The buyer is responsible for import fees and taxes into their country. That is not covered in the shipping fee that Shock Surplus charges.