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AccessoriesU-Bolts, Round/set, 2.81″x7″ (UR281x70)
SET OF FOUR ROUND U-BOLTS w/hardware
2.81″ diameter x 7″ 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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Lifestyle
PIT MAT, 24″ x 70″, Roll Up (LS-pit mat)
NEW! Calvert Racing portable roll up PIT MAT
At approx. 24″ x 70″, this sturdy black PIT MAT is much larger than most portable pit mats and helps protect your back from the rockiest, hottest dirt or asphalt at the track, in your garage, driveway, or in your haulers. Convenient, sturdy, easy-to-use approx. 1/4″ thick EVA mat has two wide built-in elastic bands and a shoulder strap for easy transport. No foam to compress or wear down over time; just firm protection for your clothes and back.
Lower profile than creepers, perfect for lower vehicles. Easy roll up with attached elastic loops and a carrying strap, easy to store in your truck, toy hauler, trailer, etc. and grab when you need it. No storage bag to store or carry, just roll, loop and go!
Limited number in stock – order today!
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CalTracs - Trucks
CalTracs Truck (7620-325)
1973-1979 Ford F-100 2WD with 3.25 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.
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 3.00 inches diameter, please see part #7620-300
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CalTracs - Trucks
CalTracs Truck (3740)
2004-2012 Chevrolet Colorado (REVERSE SPRING EYE)
2004-2012 GMC Canyon (REVERSE SPRING EYE)
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. INCLUDES REQUIRED SQUARE UBOLTS.
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. 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 Links
CalTracs Force transfer Links/pair- 23″ (L205-230-265)
SET OF TWO
1.25″ diameter x 23″ force transfer links. Measure end to end. Can be lengthened 3/4″ each end by turning once installed.
Made with 4130 Chromoly, the CalTracs preload link is light weight but strong, ensuring maximum leverage and minimum flex. Gloss black powder coated for added durability.
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Accessories
2.25 ” Axle Perch/pair (HDP-225)
SPRING PERCHES FOR 2.25″ 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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Leafsprings
Split Mono Leafsprings/pair -1″ Drop (631-35)
1964-1965 Mercury Comet
1964-1965 Mercury Cyclone
-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.
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Sale!Lifestyle
Calvert Hat Camo Green (HAT-G) DISCONTINUED
NEW! GREEN CAMO HAT
100% cotton baseball-style cap with fully embroidered Calvert Racing logo in silver and blue. Eyelet vents. Velcro back for the perfect fit! Camo style available in Green or Pink.
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CalTracs Pivot Plates
CalTracs Monster Pivot Plates/set of 4 (PL-0424)
SET OF FOUR MONSTER PLATES, FOUR HOLES
Designed for RACING VEHICLES. Four holes for ultimate adjustability on lifted vehicles. Made with 5/16″ Mild Steel, black powder coated for added durability. 8″ 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 begin using the hole that allows the traction bars to be most parallel to the ground when your vehicle is fully loaded, weight on tires. Adjust according to how your vehicle responds and your desired level of hook.
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