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LeafspringsSplit Mono Leafsprings/pair +1″ Height (420-37H)
1961-1963 Dodge Polara
+ 1″ 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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Accessories
SPRING SHACKLES/set (SH-300x562HD)
Calvert Racing Shackles and Bushings, pair
Fits: S10 trucks with FACTORY multi springs only (will NOT currently fit trucks with Calvert Springs).
Toss out your old worn out S10 shackles for a new HEAVY DUTY replacement. Set includes rubber bushings for the upper frame and rear spring eyes. Sold as a pair, required hardware included.
NOTE: SHACKLES SHOULD MOVE FREELY WHEN VEHICLE IS ON THE GROUND. VERIFY BY WATCHING THE INSTALLED SHACKLE AND SPRING WHILE SOMEONE BOUNCES ON THE BUMPER.
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Sale!Lifestyle
USA 250th Birthday Flag 2026 *SOLD OUT*
LIMITED PURCHASE!
Celebrate America’s 250th Birthday (1776-2026) with this durable 2-sided flag designed by Calvert Racing, only a limited number available!
SPECS: 3 ft x 2 ft printed polyester double hemmed, grommets for hanging/adding to a flag pole
SPECIAL PRICE less than cost!
(0 reviews) -
Lifestyle
EXTENSION MAGNET (LS-ExtMagnet)
NEW!! TELESCOPING MAGNET, each
5″ collapsed, telescopes to 25″, clip for pockets. Strong magnet picks up those metal nuts, bolts, metal pieces from hard to reach places, under tool boxes, workshop nooks, under cars, anywhere you can’t – quite – reach. Great for toolboxes, glove compartments, junk drawers.
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CalTracs - Trucks
CalTracs Truck (5512)
2006-2009 Dodge Ram 2500 2WD MEGA CAB ONLY
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.
(0 reviews) -
CalTracs - Trucks
CalTracs Truck (5515)
2010-2018 Dodge Ram 2500 2WD
2010-2018 Dodge Ram 3500 2WD
NOTE: THIS PART # WILL NOT FIT MEGA CAB. Mega Cab Special Order: Call 661-728-9600 M-F, 8am-4:30pm Pacific Time.
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.
(0 reviews) -
Lifestyle
XL NAVY POLO SHIRT (Polo-XN)
EXTRA LARGE EMBROIDERED POLO SHIRT – NAVY
Three Button traditional Polo, 50/50 Dry Blend with 2-color Embroidered Calvert Racing Logo. Gildan brand shirt, made in Honduras. Machine washable, cold with like colors.
Available in limited quantities in L, XL, 2XL only.
Large Shown.
(0 reviews) -
Lifestyle
2XL NAVY POLO SHIRT (Polo-2XN)
2X LARGE EMBROIDERED POLO SHIRT – NAVY
Three Button traditional Polo, 50/50 Dry Blend with 2-color Embroidered Calvert Racing Logo. Gildan brand shirt, made in Honduras. Machine washable, cold with like colors.
Available in limited quantities in L, XL, 2XL only.
Large Shown.
(0 reviews) -
Lifestyle
2XL BLACK POLO SHIRT (Polo-2XB)
2X LARGE EMBROIDERED POLO SHIRT – BLACK
Three Button traditional Polo, 50/50 Dry Blend with 2-color Embroidered Calvert Racing Logo. Gildan brand shirt, made in Honduras. Machine washable, cold with like colors.
Available in limited quantities in L, XL, 2XL only.
Large Shown.
(0 reviews)
