CENTERING PIN 9/16″ (truck springs)
Set of two 1/2″ thick lowering blocks, interlocking and stackable via a 9/16″ centering pin and recess for most cars. You can stack more to achieve the drop you prefer: 1 pair= 1/2″ drop, 2 pairs= 1″ drop, etc.
Made with MILD STEEL, significantly stronger than aluminum.
LB-01 shown.
If you are unsure which part number will best fit your vehicle, please call Calvert Racing at 661-728-9600, Monday – Friday, 8:00am-4:30pm, PST.
$35.00
In Stock
SET OF FOUR ROUND U-BOLTS w/hardware
2.5″ axle diameter x 6″ long
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.
(UR250x60 shown)
SET OF FOUR ROUND U-BOLTS w/hardware
3″ axle diameter x 9″ 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)
Built for Mopar A-Body.
Sold as a pair.
(SR-40 shown)
SET OF FOUR ROUND U-BOLTS w/hardware
2.75″ axle diameter x 9″ 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)
SET OF FOUR ROUND U-BOLTS w/hardware
2.5″ axle diameter x 6″ long
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.
(UR250x60 shown)
SET OF FOUR ROUND U-BOLTS w/hardware
3″ axle diameter x 9″ 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)
Built for Mopar A-Body.
Sold as a pair.
(SR-40 shown)
SET OF FOUR ROUND U-BOLTS w/hardware
2.75″ axle diameter x 9″ 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)
SET OF FOUR ROUND U-BOLTS w/hardware
2.5″ axle diameter x 6″ long
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.
(UR250x60 shown)
SET OF FOUR ROUND U-BOLTS w/hardware
3″ axle diameter x 9″ 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)
Built for Mopar A-Body.
Sold as a pair.
(SR-40 shown)
SET OF FOUR ROUND U-BOLTS w/hardware
2.75″ axle diameter x 9″ 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)