CalTracs Replacement Parts
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CalTracs Rear Mounts
CalTracs Rear Spring Mount (MT-4)
SOLD SEPARATELY
RIGHT 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.
LEFT Rear Spring Mount available, part # MT-3
(0 reviews) -
Accessories
U-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)
(0 reviews) -
Accessories
U-Bolts, Square/set, 2.5″x11.5″ (SQ250x1150)
SET OF FOUR SQUARE U-BOLTS w/hardware
2.5″ axle diameter x 11.5″ long, axle BELOW springs.
Square U-bolts, Grade 5 material, zinc plated, 9/16″ diameter. Set includes 4 U-bolts, plates, nuts and washers.
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 FEQ page or CalTracs Installation Guide for more info.
(SQ300x900 shown)
(0 reviews) -
Accessories
U-Bolts, Round/set, 3.5″x7″ clearance (CUR350x70)
CLEARANCE
SET OF FOUR ROUND U-BOLTS w/hardware
fits 3.5″ axle diameter x 7″ long, axle ABOVE springs
Round U-bolts, Grade 5 steel, rust resistant coating, 1/2″ diameter, Sets 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.
(0 reviews) -
CalTracs Rear Mounts
CalTracs HD Rear Spring Mount (MT-2504)
SOLD SEPARATELY
Rear Spring Mount for HD Truck CalTracs assembly. Designed for HD Trucks with 4″ diameter axle AND 3″ wide leafspring.
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 LEFT OR RIGHT SIDE.
(0 reviews)

















