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LeafspringsSplit Mono Leafsprings/pair (321-34)
*** CURRENTLY OUT OF STOCK – EXPECT BACK IN STOCK APPROX MAY 1, 2024 ***
1973-1987 Chevrolet C-10 Truck (56″)*
*Spring measured center eye to center eye along spring arch.
-1″ DROP HEIGHT SPLIT MONO LEAFSPRINGS, PER PAIR
Tested on the fastest stock suspension cars in the world, Calvert’s Split Mono Leafsprings are designed to control and reduce excessive body separation in rear suspension and plants the rear tires without unloading. Parabolic rear half design distributes the main spring pressure point through the length of the half, reducing spring breakage.
All of Calvert Racing’s Split Mono Leafsprings are assembled to order with grade 8 hardware and heavy-duty alignment clamps. Aluminum bushings are pressed into the front spring eyes and polyurethane bushings in the rear spring eyes, these springs have been proven to withstand over 2,500 HP at ¼ mile ETs in the 6s.
NOTE: Calvert Racing Springs are designed for DRAG RACING and have a higher spring rate / stiffer ride than stock springs. Spring halves are dipped in black paint before assembly, but some raw steel may show due to deburring/grinding sharp edges.
Calvert Split Mono Leafsprings are designed to work with CalTracs to maintain arch. While street driving does not put undue stress on the springs, racing with Calvert springs without a traction device installed may result in bent or de-arched springs.
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Accessories
SPRING SHACKLES/set (SH-300x562B)
Calvert Racing Shackle and Bushing set for B and E-Body Mopar Chrysler products.
This kit includes 1 pair of shackles and a total of 8 polyurethane bushings, 4 for the rear of the spring and 4 for the upper frame above the shackle. These shackles feature a 9/16″ shouldered bolt that necks down to a 3/8″ thread, with the required nuts included. 3-1/2″ center to center.
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Accessories
ALUMINUM BUSHING/SET (BK-32)
1973-1987 Chevrolet C-10
Kit includes two aluminum bushings and 2 steel inserts, one grease packet for FACTORY leafspring front spring eye.
If you need replacement bushing for Calvert Springs, please call us directly.
(BK-34 shown)
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Accessories
U-Bolts, Round/set, 2.75″x9″ (UR275x90)
SET OF FOUR ROUND U-BOLTS w/hardware
2.75″ axle diameter x 9″ long, for axle ABOVE springs
Round U-bolts, zinc plated Grade 5 material, 1/2″ diameter, kits include 4 U-bolts, with nuts and washers.
NOTE: While you can use your vehicle’s stock ubolts with CalTracs, Calvert Racing’s 1/2″ diameter u-bolts is an upgrade as most stock applications come with 7/16″ diameter u-bolts. We recommend torqueing the u-bolts to 65-70 foot lbs. After running the vehicle down the track a few times, we also recommending checking the u-bolts and readjusting if necessary. Please see the FAQ page on this website or CalTracs Installation Guide for more info.
(UR275x70 shown)
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Leafsprings
Split Mono Leafsprings/pair 1500 Series Trucks (330-44)
1988-1998 GMC Sierra 1500
1988-1998 Chevrolet Silverado 1500
1500 SERIES TRUCKS SPLIT MONO LEAFSPRINGS, PER PAIR
-1″ DROP RIDE HEIGHT
Half the weight of factory mono-leafpsrings, Calvert’s parabolic split mono-leaf design is built especially for street or racing ONLY. These springs are not intended for hauling or towing.
Tested on the fastest stock suspension cars in the world, Calvert’s Split Mono Leafsprings are designed to control and reduce excessive body separation in rear suspension and plants the rear tires without unloading.
All of Calvert Racing’s Split Mono Leafsprings are assembled to order with grade 8 hardware and heavy-duty alignment clamps. Aluminum bushings are pressed into the front spring eyes and polyurethane bushings in the rear spring eyes, these springs have been proven to withstand over 2,500 HP at ¼ mile ETs in the 6s.
NOTE: Calvert Racing Springs are designed for DRAG RACING and have a higher spring rate / stiffer ride than stock springs. Spring halves are dipped in black paint before assembly, but some raw steel may show due to deburring/grinding sharp edges.
Calvert Split Mono Leafsprings are designed to work with CalTracs to maintain arch. While street driving does not put undue stress on the springs, racing with Calvert springs without a traction device installed may result in bent or de-arched springs.
(0 reviews) -
CalTracs - Trucks
CalTracs Truck (7314)
2015-2023 Ford F-150 (flipped)
2015-2023 Ford Raptor (flipped)
NOTE: WILL NOT FIT IF YOUR VEHICLE HAS A RIDETECH LOWERING SYSTEM INSTALLED.
Designed especially for trucks. Bolt On traction system. Full pre-load adjustability, keeps axle from rotating/maintains pinion angle, eliminates spring wrap up, improves 60′ times. Black powder coated. Berlin-style pivot plates for most applications.
Specializing in leaf spring traction systems since 1995, the Calvert Racing Team knows what it takes to get your truck hooking harder than ever whether you’re drag racing, sled pulling or just towing. Helps eliminate wheel hop. Designed by racers for racers, CalTracs boasts unsurpassed quality and craftsmanship; the competition is eliminated right off the starting line. The preload link is made with Chromoly, lightweight but strong, ensuring maximum leverage and minimum flex. HD Rod Ends have a radial static load capacity of over 14,000 pounds. Two-piece aluminum front spring eye bushings assembly keeps the front pivot squared and rigid. The rear mounts are made with 5/16” mild steel to withstand the correct torque on your u-bolts, keeping the rear end from moving.
FULL COLOR INSTALLATION GUIDE INCLUDED.
NOTE: Your final product may vary from photo depending on your application. Some applications require additional hardware.
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CalTracs - Standard
CalTracs Standard (4209)
THIS KIT INCLUDES 2-HOLE PIVOT PLATES.
Designed for applications with inboard springs.
1963-1976 Dodge Dart/Swinger (3″ inboard)
1962-1976 Dodge Demon (3″ inboard)
1964-1969 Plymouth Barracuda (3″ inboard)
1970-1976 Plymouth Duster (3″ inboard)
1962-1963 Plymouth Fury (3″ inboard)
1962-1964 Plymouth Savory (3″ inboard)
1960-1976 Plymouth Scamp (3″ inboard)
1960-1966 Plymouth Valiant (3″ inboard)
Designed by Race legend John Calvert. Bolt On traction system. Full pre-load adjustability, keeps axle from rotating/maintains pinion angle, improves 60′ times. Black powder coated for durability. Standard and Low Pro pivot plates available.
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Specializing in leaf spring traction systems since 1995, the Calvert Racing Team knows what it takes to get your car hooking harder than ever. Designed by racers for racers, CalTracs boasts unsurpassed quality and craftsmanship; the competition is eliminated right off the starting line. The preload link is made with Chromoly, lightweight but strong, ensuring maximum leverage and minimum flex. ¾” Rod Ends have a radial static load capacity of over 14,000 pounds. Two-piece aluminum front spring eye bushings assembly keeps the front pivot squared and rigid. The rear mounts are made with 5/16” mild steel to withstand the correct torque on your u-bolts, keeping the rear end from moving.
.
NOTE: Your final product may vary from photo depending on your application. Some applications require additional hardware. U-bolts NOT included in the kit but are available if desired.FULL COLOR INSTALLATION GUIDE INCLUDED.
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Australia
CR Series Rear Shocks/pair 13″-13.5″ Universal (CR22116)
Designed for vehicles that fit shocks with 1/2″ eyelet on BOTH ends.
Universal 9-Way Adjustable Shock pair.
AUSTRALIAN VEHICLES: 1971-1984 Holden HQ/WB Ute, One Tonner, Panel Van*
* Spring ride heights or shock location may affect part numbers. Contact our Australian Dealers for information.
NOTE: Please note on your order if you have a transbrake, footbrake, or manual transmission/stick shift.
Collapsed Length: 11.58″, Extended Length: 17.5″ *
* Approximate lengths. Please note that Racing Shocks require different collapsed/extended lengths than stock/street shocks. Measure center eyelet to eyelet with car on the ground and weight on the tires.
Please call if you have any questions.
Calvert Racing’s CR Series 9-Way Adjustable Rear Shocks twin tube design has what you need for all around best performance and maximum consistency. The dampeners allow you to control rear body separation through an external dial to keep the tires planted.
Constructed of steel with heavy duty 5/8 shaft ensures durability in the most stressful conditions, the 9-Way Adjustable dial is located outside the body for easy access to adjust rebound and to control rear body separation. Great for street/strip use.Generic eyelet/eyelet shock shown
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Accessories
HANGERS/SET (H1510)
1999-2006 GM/Chevrolet 1500 series trucks (-2″ drop)
Designed to work directly with CalTracs. These hangers replace the original front hangar plates.
These front hangars are intended for use when aftermarket lowering hangars used to lower the truck will not allow the use of CalTracs on the spring. This product will lower the truck 2″ like most aftermarket hangars, but are designed to work directly with our CalTrac bar kits.
Includes (2) two hangers and required hardware.
NOTE: These will not fit long bed models or 454SS. without modification
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