Corvette Racing
Duntov Motor Co


Duntov Motor Company, LLC

13906-C Denton Drive
Farmers Branch, TX 75234

Toll Free Order Line
(888) 581-3838

Phone (972) 243-3838

Fax (972) 243-3828

Sportscar Vintage Racing

Lake Forest Sportscars
Corvette Grand Sport
Duntov Motor Company

1963 Corvette Grand Sport with three tires off the ground
When Zora Duntov unveiled the independent rear suspension of the 1963 Corvette, he elevated the American sports car to a world class level. That design remained virtually unchanged for the next 20 years. In the last 25 years, we have learned how to keep this design competitive with the worlds best sports cars.

1963-77 Corvette 9-leaf standard rear spring63-77 Standard 9-Leaf Rear Spring

This 2 1/4 inch, nine leaf spring has the same 196 lb. spring rate as the original 9-leaf spring that was installed new in your 63-77 Corvette. It is going to feel twice as stiff as your old one when you install it, since your old spring has very likely lost 50% of its spring rate over the years. Click on the Option Button to get the original style curled up end leaves (in case you are building a car for Bloomington Gold). Free Freight
63-77 Standard 9-Leaf Rear Spring

R020 1963-77 Corvette HD F41 7-leaf rear spring 63-77 HD F41  7-Leaf Rear Spring

This 2 1/4 inch, seven leaf spring came with the F41 option, and is rated at 330 lbs, for a substantially firmer ride.
Choose the R022 if you want this spring to pass muster with the Blooming Gold crowd.

Free Freight

 63-77 HD F41  7-Leaf Rear Spring

R021 Corvette 7-leaf spring with original style curled leafs
These curled leaf springs are close to the original, but they may not pass NCRS inspectors. They are as close as we have found. If you are going for Bloomington Gold, send your spring to us and we will dissassemble it, re-arc it and put it together as original for the same price. Select whether you want us to reman yours or you want this new spring.

Free Freight

7-Leaf Spring with Orig Style Curled Leafs

R030 1978-82 Corvette standard rear leaf spring78 - 82 Standard Rear Leaf Spring

These springs are 2 1/2 inches wide, 9-leaf with the stock 260 lb. spring rate. Corvettes put on weight in the later years of the C3, and needed the additional spring rate. If you have a 78 Corvette, measure the width of your old spring! Chevrolet changed to the wider spring early in the model year, and this wide one won't fit your car if you have the early design spring mount. Free Freight

78 - 82 Standard Rear Leaf Spring

1963-82 Corvette rear spring bolt kit63 - 79 Rear Spring Mount Plate Kit

This is a nice powder coated plate with the correct Grade 8 bolts and lock washers.

63-77, 2 1/4" Spring
78-79, 2 1/2" Spring

ball joints63 - 82 Rear Spring Bolt Kit

Here are three options for the hardware package that mounts the end of the spring to the trailing arm. The OEM set is an exact GM replacement, while the R052 set has aircraft style 7/16th inch Grade 8 bolts with lock nuts in place of the OEM style bolts with cotter pins. I recommend using the less expensive but stronger aircraft style bolts, unless you are trying to impress the NCRS. You can also get this set with Poly bushings, or with 2 inch longer spring bolts to give you some more ride height adjustment.

OEM Spring Bolt Kit

Aircraft Style Spring Bolt Kit

Long Bolt Spring Bolt Kit

Add for Poly Bushings

1963-79 Corvette rear bushing and shim set63-79 Rear Bushing and Shim Set

Included here are the differential crossmember bushings, diff front mount bushings, trailing arm bushings, trailing arm SS shim and bolt kit, OEM spring mount kit, and strut rod bushings. The diff mount bushing is not offered in poly.

Free Freight

63-79 Rear Bushing and Shim Set
Add for Poly Bushings

R060 1963-82 Corvette composite rear leaf spring63-82 Composite Rear Leaf Spring

This is the famous TRW composite spring. It will be shipped directly from the factory to you. Springs are available in either 315, 340 or 355 LB spring rates. Each spring comes with a heat shield and all mounting hardware. Note: The 315 LB spring rate is not available for model years 80-82. These springs are made to order. Allow 8-10 business days for manufacturing, plus the shipping time.

Specify Spring Rate - Specify Year - Free Freight

63-82 Composite Rear Leaf Spring
Spring Rate

1963-82 Corvette strut rod set63 - 82 Strut Rod Set

This is one car set of NEW OEM strut rods with rubber bushings. 63-74 have the small bushings, 75-79 have the big bushings, and 80-82 are angled at the end and get the large bushings.

Free Freight

63-74 (small bushings)
75-79 (big bushings)
80-82 (angled bushings)
add for Poly Bushings

1963-82 Corvette strut rod bushings63 - 82 Strut Rod Bushings

If your strut rods have not been used as a jacking point, you could get by with bushings only. We offer both OEM and Poly. This is a good place to use Poly in your suspension, as it deflects less under load and therefore helps keep the outside rear tire from going into positive camber. Unlike front end Poly bushings, there is no price to pay in ride harshness with Poly strut rod bushings. ONE CAR SET.

63-74 OEM Small Strut Rod Bushing Set
75-82 OEM Large Strut Rod Bushing Set
Poly Strut Rod Bushing Set

R077 1963-82 Corvette strut rod cam assemblies63 - 82 Strut Rod Cam Assemblies

There is no reason to do only one side, so here you get it all. When your Corvette can no longer hold the rear camber adjustment, its a good bet these bolt sets are rusted out and need replacement.

OEM Cam Assemblies

R078 1963-79 Corvette adjustable strut rod set63 - 79 Adjustable Strut Rod Set

Inspired by our racecar suspension set, this set features poly bearings, yet mounts in the standard fashion.

Specify Year - Free Freight

63 - 79 Adjustable Strut Rod Set

R079 1963-82 Corvette racing strut rod set63 - 82 Racing Strut Rod Set

For racing applications, this is the only way to go. As you know, the strut rod acts as the lower control arm on the rear suspension of the 63-82 Corvette. For racing, nothing but steel will do for bushings. These are high quality spherical rod ends, Left and Right hand threaded to simplify camber adjustment. The camber support bracket has been strengthened and modified to accommodate the rod ends. If you are installing this set on a street car with a composite spring and heat shield, this setup won't work The strut rod mounting locations are lowered in the bracket and the heat shield mounting tabs have been removed. Free Freight

Racing Strut Rod Set

1963-82 Corvette AC Delco performance shocks63-82 AC Delco Performance Shocks

These shocks are recommended for use with the F-41 suspension option, and for cars with composite rear springs.

Free Freight for Orders Over $100

Rear Axle Set Delco Shocks
Car Set Delco Shocks

R090 1963-82 Corvette rear shock mount bolt set63 - 82 Rear Shock Mount Bolt Set

With proper castle nut, a beautiful forged steel reproduction made in the USA. You get a new upper bolt as well.

Specify Left or Right

63 - 82 Rear Shock Mount
Bolt Set


Duntov Motor Company is the exclusive licensee for the continued production of the authentic original Corvette Grand Sport.  Duntov Motor Company is the exclusive licensee for the manufacturing and distribution of the updated street version of this famous car. We service what we sell. We also restore and service 1963-1982 Corvette race, street and performance cars using original and replacement parts including front and rear suspension, brake calipers, brake rotors, brake pads, both J-56 and stock brake caliper pistons, and Corvette stainless steel parking brake parts. We offer the finest original U.S. built Corvette spindles and GM stub axles, along with remanufactured Corvette differentials for both street and race cars. We build both new and rebuilt Corvette trailing arm assemblies for 1965-1982 Corvettes, and offer Corvette street and racing springs and both steel and composite leaf springs in a wide selection of spring rates. Check out our Corvette parts section for shocks, sway bars, upper and lower A-arms, Corvette ball joints, tie rod ends, pitman arms, idler arms, shocks and U-joints.

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