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Accessories2.75 ” Axle Perch/pair (HDP-275)
SPRING PERCHES FOR 2.75″ 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, see graphic for info.
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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CalTracs - Trucks
CalTracs Truck (7610-300)
1968-1972 Ford F-100 2WD with 3 inch diameter axle tube
Designed especially for trucks, axle BELOW springs. 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.
This kit requires and INCLUDES a set of square u-bolts.
SQUARE U-BOLTS (spring OVER axle): Calvert Racing’s square u-bolts are 9/16″ ” diameter. We recommend torqueing truck/square u-bolts to 90-100 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 FAQ page or CalTracs Installation Guide for more info.
FULL COLOR INSTALLATION GUIDE INCLUDED.
NOTE: Your final product may vary from photo depending on your application. Some applications require additional hardware. If your axle tube measures 3.25 inches diameter, please see part #7610-325
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CalTracs Rear Mounts
CalTracs Rear Spring Mount, Left (MT-37L)
Chevrolet S10 with shock mounts.
SOLD SEPARATELY
LEFT Rear Spring Mount for CalTracs assembly.
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 mount available, part # MT-37R
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CalTracs Pivot Plates
CalTracs HD Pivot Plates, 2 hole (PL-0522)
SET OF FOUR RACING PROFILE PLATES
Designed for RACING TRUCKS. Two Hole, Berlin style plates for center spring eye. Made with 5/16″ Mild Steel, black powder coated for added durability. 5″ long, measured from center of spring eye to bottom of plate.
IMPORTANT: INCLUDE YEAR, MAKE AND MODEL IN THE CUSTOMER NOTES SECTION SO WE MAY VERIFY THE CORRECT PARTS ARE SENT.
NOTE: It is recommended that you use the hole that allows the traction bars to be most parallel to the ground when your vehicle is fully loaded, weight on tires.
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CalTracs - Standard
CalTracs Standard (6400)
THIS KIT INCLUDES 2-HOLE PIVOT PLATES.
Built for:
1964-1965 Ford Falcon
1967-1973 Ford Mustang with 9″ axle, Standard Eye, axle tube diameter 2.8″ – 3.25″. If your Mustang has aftermarket springs, please CALL Calvert Racing at 661-728-9600 for the correct part number for your vehicle.
Rod Ends/Heim Joints NOW COME WITH GREASE ZERKS. Add a small amount of grease to reduce chatter.
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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Leafsprings
Split Mono Leafsprings/pair 1500 Series Trucks -1″ Drop (340-44)
1999-2018 GMC Sierra 1500
1999-2018 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.
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Leafsprings
Split Mono Leafsprings/pair Stock Height (420-35)
1963-1976 Dodge Dart
1962-1976 Dodge Demon
1964-1969 Plymouth Barracuda
1970-1976 Plymouth Duster
1962-1964 Plymouth Savoy
1960-1976 Plymouth Scamp
1960-1966 Plymouth Valiant
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.
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CalTracs Rear Mounts
CalTracs Rear Spring Mount (MT-2)
1970-1981 Chevrolet Camaro.
SOLD SEPARATELY
Rear Spring Mount for CalTracs assembly
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.
MOUNT FITS BOTH LEFT AND RIGHT SIDE.
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CalTracs - Standard
CalTracs Standard Low Pro (2201)
THIS KIT INCLUDES LOW PROFILE (1 Hole) PIVOT PLATES.
Built for
1963-1967 Chevrolet Nova Chevy II. Rod Ends/Heim Joints NOW COME WITH GREASE ZERKS. Add a small amount of grease to reduce rattle.
Low Profile allows approx. 1.5″ more ground clearance for vehicles used for every day street driving.
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.
.
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: Part #2301 shown. 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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