1997-2004 Ford F150
Kit includes two aluminum bushings and 2 steel inserts for FACTORY leafspring front spring eye, 1 grease packet.
If you need replacement bushing for Calvert Springs, please call us directly.
(BK-34 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.
*** Please note that measurements/dimensions listed are for packaging/shipping purposes. Please call if you need exact measurements.
$65.00
In Stock
Built for Mopar A-Body.
Sold as a pair.
(SR-40 shown)
FLIP CONVERSION KIT for 1500 SERIES TRUCKS (for CalTracs)
1967-2019 Chevrolet Silverado and GMC Sierra Trucks
Basic FLIP CONVERSION KIT for 1500 Series Trucks with CalTracs* and a 3″ axle tube and 2.5″ wide spring* already installed.
Includes: Two Rear Mounts, Two patented Calvert Heavy Duty Perches, and set of Four U-Bolts with hardware.
A flip kit moves the axle from beneath the leaf spring to on top of the leaf spring, which lowers the truck.
ALSO AVAILABLE: Flip kit for 3″ axle tube and 2.5″ wide spring, part #FLP-3132
*THIS CONVERSION KIT DOES NOT INCLUDE CALTRACS.
SET OF FOUR SQUARE U-BOLTS w/hardware
3″ axle diameter x 13.5″ long, axle BELOW springs.
Square U-bolts, Grade 5 material, zinc plated, 9/16″ diameter. Set includes 4 U-bolts, plates, nuts and washers.
SQUARE U-BOLTS (spring OVER axle): 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 CalTracs Installation Guide for more info.
(SQ300x900 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)