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Accessories3.5″ Axle Perch/pair (HDP-350)
SPRING PERCHES FOR 3.5″ AXLE TUBE
Set of (2) Two Perches. Fully enclosed for added strength, pedestal tabs ensure heat penetration when welded to housing. Perch extends to center line of axle tube for more surface area. Precision laser cut. Requires welding to axle.
Check out the comparison graphic to see how Calvert’s patented Heavy Duty Perches compare to other manufacturer’s stock perches.
Patented HD Axle Perches. Universal design fits nearly every application. Available to fit the most common axle tube diameters; 2.25″, 2.5″, 2.75″, 3″, 3.25″ and 3.5″
WELDING ONTO AXLE: Pinion angle recommendation is -2 to -4 degrees when used with CalTracs. NOTE: This is the angle of the pinion in relation to the angle of the output shaft of the transmission, NOT the driveshaft. Add the angle of the pinion yoke to the angle of the output shaft with the vehicle sitting at rest with weight on the tires.
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Accessories
HANGERS/SET (H64)
1962-1965 Ford Fairlane
Designed to work directly with CalTracs. These hangers replace the original front hangar plates.
Includes (2) two hangers and required hardware.
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Leafsprings
Split Mono Leafsprings/pair Stock Height (320-37)
1973-1987 Chevrolet C-10 Truck (52″)*
*Spring measured center eye to center eye along spring arch.
STOCK 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
FLIP CONVERSION KIT 1500 Series Trucks w/CalTracs INSTALLED (FLP-3132)
FLIP CONVERSION KIT for 1500 SERIES TRUCKS (for CalTracs)
1967-2019 Chevrolet Silverado and GMC Sierra Trucks
Basic FLIP CONVERSION KIT for 1500 Series Trucks with CalTracs* and a 3.25″ axle tube and 2.5″ wide spring* already installed.
Includes: Two Rear Mounts, Two patented Calvert Heavy Duty Perches, and set of Four U-Bolts with hardware.
A flip kit moves the axle from beneath the leaf spring to on top of the leaf spring, which lowers the truck.
ALSO AVAILABLE: Flip kit for 3″ axle tube and 2.5″ wide spring, part #FLP-3134
*THIS CONVERSION KIT DOES NOT INCLUDE CALTRACS.
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Leafsprings
Split Mono Leafsprings/pair -1″ Drop (652-35)
1966-1971 Ford Fairlane
1968-1976 Ford Torino
-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.
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) -
Leafsprings
Split Mono Leafsprings/pair Stock Height (770-35)
1983-2011 Ford Ranger
STOCK 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.
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) -
Leafsprings
Split Mono Leafsprings/pair Stock Height (652-36)
1966-1971 Ford Fairlane
1968-1976 Ford Torino
STOCK 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.
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 Rear Mounts
CalTracs Rear Spring Mount (MT-3)
SOLD SEPARATELY
LEFT Rear Spring Mount for CalTracs assembly. Designed for Chrysler vehicles.
Made with 5/16″ mild steel to withstand the correct torque on your u-bolts and keep your rear-end from moving. Black gloss powder coated for extra durability.
RIGHT Rear Spring Mount available, part # MT-4
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CalTracs - Standard
CalTracs Standard (6300)
THIS KIT INCLUDES 2-HOLE PIVOT PLATES.
Built for:
1960-1965 Mercury Comet / Cyclone
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.
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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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