Semi-Truck Frame Chassis Parts
Need semi-truck frame chassis parts? Choose from high-strength frame rails, crossmembers, and reliable fifth wheel replacement parts to keep your rig solid. Enjoy a smooth ride with quality springs and shock absorbers. Ensure stable control with our durable control arms and steering linkages. Looking for axles or frame steps? We've got those too. Shop at 4 State Trucks!
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BESTfit 23.75 Inch Torque Rod Replaces 924971 For Kenworth T800, T800 Curved Glass With Hendrickson Suspension
BESTFIT TRUCK PARTS
$198.99BESTfit 23.75 Inch Center To Center Torque Rod Fits Kenworth T800 With Hendrickson SuspensionLooking for a torque rod for your Hendrickson suspension? Our aftermarket replacement part is the perfect solution. This torque rod measures 23.75 inches center...$198.99 -
BESTfit Axle Seat Hendrickson Replaces 20755199 For Volvo VNL Gen II
BESTFIT TRUCK PARTS
$90.77BESTfit Axle Seat Hendrickson With 10 Degree Pinion AngleLooking for a reliable replacement axle seat? Our aftermarket replacement part is designed for Hendrickson axles and features a 10-degree pinion angle for optimal performance. Sold individually,...$90.77 -
BESTfit 2 Leaf Parabolic Spring For Kenworth K100C, T300-T450, T600, T600B, T600 Aerocab, T800, T800 Curved Glass
BESTFIT TRUCK PARTS
$520.99BESTfit 6,000 Lb. Capacity 4 Inch Wide 2 Leaf Parabolic SpringThe leaf spring provided is a parabolic spring type with specific dimensions and features. It includes two leaves, with a spring eye type of STD/STD. The spring eye size is 2 inches, with a...$520.99 -
BESTfit 1/8 Inch Thrust Angle Shim For Peterbilt Air Leaf Suspension - Set Of 10
BESTFIT TRUCK PARTS
$57.31BESTfit 1/8 Inch Thrust Angle Shims For Peterbilt With Air Leaf Suspension * High Quality Thrust Angle Shims* Made Of Aluminum Alloy* 1/8 Inch * Heavy Duty* 13/16 Slot Width * Helps Correct Caster Angle Problems * You Will Need To Spread The Load To...$57.31 -
BESTfit 1/16 Inch Thrust Angle Shim For Peterbilt Air Leaf Suspensions - Set Of 10
BESTFIT TRUCK PARTS
$57.31BESTfit 1/16 Inch Thrust Angle Shims For Peterbilt Air Leaf SuspensionsThe offered shim is specifically designed for use with Air Leaf Suspension systems and is constructed from sturdy steel material. Sold as a set of 10, each shim measures 1/16 inch in...$57.31 -
BESTfit 1/32 Inch Shim For Freightliner FAS II Suspension
BESTFIT TRUCK PARTS
$42.12BESTfit 1/32 Inch Shims For Freightliner FAS II SuspensionThe provided shim is designed for FASII Suspension systems and is made of durable steel material. Each shim measures 1/32 inch in thickness and is sold as a set. Please note that this item is a...$42.12 -
BESTfit Steel 1/16 Inch Shim For Freightliner FAS II Suspension
BESTFIT TRUCK PARTS
$42.12BESTfit 1/16 Inch Shims For Freightliner FAS II SuspensionThe provided shim is specifically designed for FASII Suspension systems, made from durable steel material. Each shim measures 1/16 inch in thickness and is sold as a set. Additionally, the...$42.12 -
BESTfit Normally Closed Low Air Pressure Switch With 1/8-27 NTP Connection - Replaces FSC - 1749-2108, 1749-2134
BESTFIT TRUCK PARTS
$9.27BESTfit Normally Closed Low Air Pressure Switch Opens At 70 PSIThe low air pressure switch provided is a normally closed type that triggers at 70 PSI. Featuring a connecting thread of 1/8-27 NTP and a blade connector type, it includes threaded sealant...$9.27 -
BESTfit Torque Rod For Hendrickson PRIMAAX, FIREMAAX, Mack MAXAIR Twisted Sister AL231, AL405 Rear Air Suspensions
BESTFIT TRUCK PARTS
$93.83BESTfit 22 Inch C-C Fixed Style Torque Rod With 4.375 Inch Bolt Mounting HolesThe Torque Rod designed for rear air suspensions features a 22.00-inch center-to-center fixed style with 4.375-inch center-to-center bolt mounting holes. Sold individually,...$93.83 -
BESTfit Spacer Block For Spring Ends For Mack Rear SS34, SS38, SS44, SS50, ST34, SWS573, SW, SWS Suspensions
BESTFIT TRUCK PARTS
$8.56BESTfit Spacer Block For Mack With 4 Inch Wide SpringThe Spacer Block is designed for the spring end bushing and is compatible with various rear suspensions including SS34, SS38, SS44, SS50, ST34, SWS573, SW, and SWS. It fits SS34 and SS38 with split...$8.56 -
BESTfit Insulator Box For Spring End Bushing For Mack Rear SS34, SS38, SS44, SS50, SWS573 Camel Back Suspension
BESTFIT TRUCK PARTS
$126.99BESTfit Spring End Bushing Insulator Box - Replaces 25168110, 52QK418AP4, 52QK418BP4, R303688 & CS71632BThe Insulator Box is designed for the spring end bushing and is compatible with various suspension systems, including Rear SS34, SS38, SS44, SS50, and...$126.99 -
BESTfit Rear Trunnion For Mack SS44, SWS573 Camel Back Suspension
BESTFIT TRUCK PARTS
$366.99BESTfit Trunnion For 3.5 Inch Trunnion Shaft & 4 Inch Spring - Replaces 25130237 & 39QK55The Trunnion, suitable for SS38-44 Series, features a 3 1/2-inch shaft and comes with 1-A758 bushing. Sold individually, it does not include ears and serves as an...$366.99