Chassis & Suspension
Shop Quarter-Max for the industry's best drag racing chassis and suspension components. We manufacture and stock everything you need to build or upgrade your race car, including 4-link suspensions, anti-roll bars, coilover shocks, drag struts, rod ends, and weld-on chassis brackets. Whether you are building a Pro Mod or a bracket car, our proven suspension parts are designed to help you hook hard and put the power to the ground.
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4-Links & Components
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Anti-Roll Bars
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Back-Halfs
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Ballast & Weight Bars
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Bottle Mounts & Billet Clamps
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Brackets, Gussets & Tabs
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Drag Race Chassis Kits
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Engine Mounting
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Ladder Bars & Components
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Rear End Housings & Components
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Street Chassis & Front Clips
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Struts & Components
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Shocks, Springs & Accessories
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Wheelie Bars & Components
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Wishbones & Diagonal Links
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Out of stock
QM Weight Bar Kit
Quarter-Max
$101.84Weight Bar KitKit includes: 2 in. x 3 in. 14 in. long rectangular tube, weld-in bolt sleeves, end plates, cap and bung, bolts and nuts for mounting. Welding required.QM-219102$101.84 -
QM Weight Bar Kit, Welded
Quarter-Max
$188.99Weight Bar Kit, WeldedAdd weight nearly anywhere by filling this weight bar. Made from 2 in. x 3 in. rectangular tube, this 14 in. long weight bar comes completely welded with welded bung, aluminum...QM-219103$188.99 -
On Sale
QM Weight Bar Tab, Long Wing, 4130
Quarter-Max
Now: $7.99Was: $14.69Weight Bar Tab, Long Wing, 4130This 4130 weight bar tab is designed with integrated gussets and is cut for use on 1-1/4 in. tubing; can be adapted for use with other diameters of tubing. Sold...QM-410040-1Now: $7.99Was: $14.69 -
On Sale
QM Weight Bar Tab, Long Wing, 4130, Welded 1/2-13 Thread Nut
Quarter-Max
Now: $14.99Was: $20.99Weight Bar Tab, Long Wing, 4130, Welded 1/2-13 Thread NutThis weight bar tab is designed with integrated gussets and is cut for use on 1-1/4 in. tubing; can be adapted for use with other diameters of...QM-219113Now: $14.99Was: $20.99 -
QM Weight Bar Tab, Long Wing, 4130, Welded 1/2-20 Thread Nut
Quarter-Max
$20.99Weight Bar Tab, Long Wing, 4130, Welded 1/2-20 Thread NutThis weight bar tab is designed with integrated gussets and is cut for use on 1-1/4 in. tubing; can be adapted for use with other diameters of...QM-219109-1$20.99 -
On Sale
QM Weight Bar Tab, Long, 4130
Quarter-Max
Now: $6.99Was: $9.44Weight Bar Tab, Long, 4130This weld-on tab offers you a quick and easy way to mount your ballast. Specifications:• Material: 4130• Thickness: 1/8 in.Sold individually.QM-410040Now: $6.99Was: $9.44 -
On Sale
QM Weight Bar Tab, Long, 4130, Welded 1/2-13 Thread Nut
Quarter-Max
Now: $9.99Was: $12.59Weight Bar Tab, Long, 4130, Welded 1/2-13 Thread NutThis weld-on 4130 tab offers you a quick and easy way to mount your weight bars. It features a course thread nut which has been welded into place...QM-219111Now: $9.99Was: $12.59 -
QM Weight Bar Tab, Long, 4130, Welded 1/2-20 Thread Nut
Quarter-Max
$12.59Weight Bar Tab, Long, 4130, Welded 1/2-20 Thread NutThis weld-on 4130 tab offers you a quick and easy way to mount your weight bars. It features a nut which has been welded into place to allow for...QM-219108$12.59 -
On Sale
QM Weight Bar Tab, Short Wing, 4130
Quarter-Max
Now: $7.99Was: $14.69Weight Bar Tab, Short Wing, 4130This 4130 weight bar tab is designed with integrated gussets and is cut for use on 1-1/4 in. tubing; can be adapted for use with other diameters of tubing. Sold...QM-410040-2Now: $7.99Was: $14.69 -
On Sale
QM Weight Bar Tab, Short Wing, 4130, Welded 1/2-13 Thread Nut
Quarter-Max
Now: $14.99Was: $20.99Weight Bar Tab, Short Wing, 4130, Welded 1/2-13 Thread NutThis 4130 weight bar tab is designed with integrated gussets and is cut for use on 1-1/4 in. tubing; can be adapted for use with other...QM-219112Now: $14.99Was: $20.99 -
QM Weight Bar Tab, Short Wing, 4130, Welded 1/2-20 Thread Nut
Quarter-Max
$20.99Weight Bar Tab, Short Wing, 4130, Welded 1/2-20 Thread NutThis 4130 weight bar tab is designed with integrated gussets and is cut for use on 1-1/4 in. tubing; can be adapted for use with other...QM-219109$20.99 -
On Sale
QM Weight Bar Tab, Short Wing, Titanium, Welded 1/2-13 Thread Nut
Quarter-Max
Now: $34.99Was: $52.49Weight Bar Tab, Short Wing, Titanium, Welded 1/2-13 Thread NutThis titanium weight bar tab is designed with integrated gussets and is cut for use on 1-1/4 in. tubing; can be adapted for use with...QM-219112-TNow: $34.99Was: $52.49 -
QM Weight Bar Tab, Short, 4130
Quarter-Max
$7.34Weight Bar Tab, Short, 4130This weld-on tab offers you a quick and easy way to mount your ballast. Specifications:• Material: 4130• Thickness: 1/8 in.• Hole Size: 1/2 in.Sold individually.QM-410134$7.34 -
On Sale
QM Weight Bar Tab, Short, 4130, Welded 1/2-13 Thread Nut
Quarter-Max
Now: $9.99Was: $11.54Weight Bar Tab, Short, 4130, Welded 1/2-13 Thread NutThis weld-on 4130 tab offers you a quick and easy way to mount your weight bars. It features a course thread nut which has been welded into place...QM-219110Now: $9.99Was: $11.54 -
QM Weight Bar Tab, Short, 4130, Welded 1/2-20 Thread Nut
Quarter-Max
$11.54Weight Bar Tab, Short, 4130, Welded 1/2-20 Thread NutThis weld-on 4130 tab offers you a quick and easy way to mount your weight bars. It features a nut which has been welded into place to allow for...QM-219107$11.54 -
QM Weight Bar Tab, Short, Titanium
Quarter-Max
$25.19Weight Bar Tab, Short, TitaniumThis weld-on tab offers you a quick and easy way to mount your ballast. Specifications:• Material: Titanium• Thickness: 1/8 in.• Hole Size: 1/2 in.Sold individually.QM-410134T$25.19 -
QM Weld-On Motorplate Base Mount, 4130
Quarter-Max
$5.99Simplify your engine mockup and service routine with the Quarter-Max 4130 Motor Plate Base Mount. Engineered specifically for high-stress drag race applications, this heavy-duty mount welds directly...QM-411176$5.99 -
QM Welded 4-Link Back-Half, 2" x 3"
Quarter-Max
This item ships truck freight only. Please call 309-343-7575 to order.Our Welded 4-Link suspension includes frame rails, 2x3 crossmember, Quarter-Max 4-Link Kit # 301101, diagonal link, 180°...QM-302113 -
QM Welded Air Cylinder Mount
Quarter-Max
$18.89Use this tab on your chassis to mount part #630026-3QM-0229$18.89 -
QM Welded Ladder Bar Suspension Back-Half
Quarter-Max
This item ships truck freight only. Please call 309-343-7575 to order.Our welded ladder bar suspension includes Double Adjustable Ladder Bars #302102, frame rails, 2x3 crossmember, chassis brackets,...QM-302112 -
QM Wheel Spacer for High Misalignment Strange Struts
Quarter-Max
$15.74Upgrade your front-end setup with the precision and durability of the Quarter-Max Wheel Spacer, specifically engineered for High Misalignment Strange Struts. When every thousandth of an inch counts,...QM-420712$15.74 -
On Sale
QM Wheelie Bar Load Cell with 1/2" Hole x 3/4"-16 Thread, 4130
Quarter-Max
Now: $399.99Was: $415.79Exclusive QM Wheelie Bar Load Cell designed to be stronger than any other load cell on the market. Relay the amount of force applied on your wheelie bars to your Racepak with this load cell. Fill the...QM-219705-2Now: $399.99Was: $415.79 -
On Sale
QM Wheelie Bar Load Cell, 5/8"-18 Female x 3/4"-16 Male, 4130
Quarter-Max
Now: $299.99Was: $391.64Relay the amount of force applied on your wheelie bars to your Racepak with this load cell. Fill the load cell with brake fluid and install the sensor into the 1/8" NPT port. Modification of current...QM-219705Now: $299.99Was: $391.64 -
QM Wheelie Bar Support Kit, 1 In. Tube Size
Quarter-Max
$179.54This Wheelie Bar Support Kit ties the upper and lower wheelie bar tubes together for added strength and less flexibility. Recommended for extremely high horsepower applications such as Pro Modified,...QM-201220-1$179.54 -
QM Wheelie Bar Support Kit, 1-1/2 In. Tube Size
Quarter-Max
$179.54This Wheelie Bar Support Kit ties the upper and lower wheelie bar tubes together for added strength and less flexibility. Recommended for extremely high horsepower applications such as Pro Modified,...QM-201220-3$179.54 -
QM Wheelie Bar Support Kit, 1-1/4 In. Tube Size
Quarter-Max
$179.54This Wheelie Bar Support Kit ties the upper and lower wheelie bar tubes together for added strength and less flexibility. Recommended for extremely high horsepower applications such as Pro Modified,...QM-201220$179.54 -
QM Wheelie Bar Support Kit, 1-3/8 In. Tube Size
Quarter-Max
$179.54This Wheelie Bar Support Kit ties the upper and lower wheelie bar tubes together for added strength and less flexibility. Recommended for extremely high horsepower applications such as Pro Modified,...QM-201220-2$179.54 -
QM Wheelie Bar Top Tube Support Bar
Quarter-Max
$25.19Wheelie Bar Top Tube Support BarSpecifications:• Thickness: 1/2"• Material: 6061-T6 aluminumQM-430629$25.19 -
QM Wheelie Bar Wheel, Steel
Quarter-Max
$34.64Wheelie Bar WheelSpecifications:• Material: Steel• Hub width: 1-5/8"Sold each.QM-219703$34.64 -
QM Window Net Mount Tab
Quarter-Max
$3.14This mount Tab, constructed from durable 4130, provides a strong and reliable attachment point for your window net. • Material: 4130• Size: .980" x .785" x .090"QM-411175$3.14 -
QM Window Tab, .190" Hole
Quarter-Max
$1.14Specifications:• Material: Mild steel• Hole Size: .190"QM-410728-1$1.14 -
QM Window Tab, 2 Holes, .065" Thick
Quarter-Max
$1.09Specifications:• Material: Mild steel• Thickness: .065"• Style: 2 holesQM-217031C$1.09 -
QM Window Tab, 2 Holes, .090" Thick Titanium
Quarter-Max
$6.81This window tab can also be used as a spoiler tab.Specifications:• Material: Titanium• Thickness: .090"• Style: 2 holes Sold IndividuallyQM-217031D-T$6.81 -
QM Window Tab, 2 Holes, .095" Thick
Quarter-Max
$1.09This window tab can also be used as a spoiler tab.Specifications:• Material: Mild steel• Thickness: .095"• Style: 2 holesQM-217031D$1.09 -
QM Window Tab, Mild Steel, .130" Hole
Quarter-Max
$1.14Specifications:• Material: Mild steel• Hole Size: .130"QM-410728$1.14 -
QM Window Tabs, 2 Holes, .063" Thick 4130 (Pack of 10)
Quarter-Max
$11.45These window tabs can also be used as a spoiler tab. Specifications:• Material: 4130• Thickness: .063"• Style: 2 holes• Size: .750" x .625" Sold as a pack of 10QM-411181$11.45 -
$3.14 -
QM Wishbone Rear End Housing Mount Kit
Quarter-Max
$54.59This wishbone housing mount kit typically welds to the top or bottom of the rear end housing to mount the wishbone slide tube rod end. Mount features a caged bracket design and a 1/2" NAS bolt for...QM-201200-2$54.59 -
QM Wishbone Rear End Housing Mount Kit, Lower
Quarter-Max
$45.99 - $61.99This wishbone housing mount kit typically welds to the bottom of the rear end housing to mount the wishbone slide tube rod end. Features high misalignment bushing design. Installed on every Pro...QM-201200 | QM-201200-1$45.99 - $61.99 -
Quarter-Max 4-Link Chassis Bracket Doubler Plate, Lower
Quarter-Max
$28.34Doubler plates are designed to weld to the 4-link brackets to add thickness and strength around the 4-link holes, while adding a minimal amount of weight. This additional strength increases bracket...QM-411033$28.34