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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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, .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, .190" Hole
Quarter-Max
$1.14Specifications:• Material: Mild steel• Hole Size: .190"QM-410728-1$1.14 -
QM Window Tab, Mild Steel, .130" Hole
Quarter-Max
$1.14Specifications:• Material: Mild steel• Hole Size: .130"QM-410728$1.14 -
QM 5 lb Lead Puck
Quarter-Max
$26.24Need to move just a little weight around? Use our 5 lb lead pucks! They have a 1/2" hole drilled through the center for easy mounting and removal.QM-219104$26.24 -
QM .380" ID x .520" OD Hardened Insert Motorplate Bushing
Quarter-Max
$4.82Press these hardened insert bushings into your motorplate to prevent the motorplate bolt holes from elongating overtime and becoming sloppy. These bushings feature a serrated edge, which helps lock...QM-217065$4.82 -
QM Bellcrank Tab
Quarter-Max
$3.56Bellcrank TabSpecifications:• Material: Steel• Thickness: 1/8 in.• Hole size: 3/8 in.Sold individually.QM-217028B$3.56 -
QM 1-5/8" ID Tube Union Bracket
Quarter-Max
$15.74Use qty-2 of this bracket to bolt two pieces of tubing together.Specifications:• 1-5/8" ID• Material: 4130• Thickness: 1/4" Also available in 1-1/2" ID.QM-411007$15.74 -
QM Pro Series Anti-Roll Bar Kit
Quarter-Max
$439.99 - $474.99Our Pro Series Anti-Roll Bar Kit works great on all cars up to 1800 horsepower and up to 4000 pounds. We have used this proven design in many Pro Stock, Pro Mod and Top Sportsman cars. The 1-1/2” ...QM-201195x$439.99 - $474.99 -
QM 3/16" Chassis Tab
Quarter-Max
$5.24Universal Chassis Tab, 3/16" Specifications: • Hole Size: 1/2" • Material: 4130• Hight: .1-7/8″ • Width: 1-3/4″ • From Center of Hole to Bottom of Tab: 1-5/16″Sold individually.QM-217026A$5.24 -
QM Clamp-On Weight Puck Mount
Quarter-Max
$66.14You can use this billet aluminum mount to clamp ballast to your chassis or roll cage. They are CNC machined from 6061-T6 and have a 1/2”-13 threaded hole for attaching ballast. Sold each.QM-219505-x$66.14 -
QM Radius Tab, 4130, Fits 1-5/8 in. Tube, 3/8 in. Hole, 1/8 in. Thick
Quarter-Max
$4.19Radius TabSpecifications:• Material: 4130• Fits 1-5/8 in. tube• Hole Size: 3/8 in.• Thickness: 1/8 in.Sold individually.QM-410733$4.19 -
QM Brakeline Tab - Thick
Quarter-Max
$1.98Use to mount bulkhead fittings to your chassis. Fits 1-1/2" tube, 3/8" hole. Thick Brakeline Tab .090” Thk Mild Steel. (Welding Required)QM-217101$1.98 -
QM Floor Support
Quarter-Max
$25.99 - $26.24Specifications:• Thickness: .032”• Material: Mild steel• Overall length: 36"• Hole spacing: 3"• Hole size: 6-32 screws• Available styles: Standard or lightenedSold each.QM-410146 | QM-410146-1$25.99 - $26.24 -
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 -
QM 3/16" Chassis Tab with 1/2" Hole
Quarter-Max
$3.29Material .188" CRMS Fits 1-1/2" tube Hole size 1/2"QM-217025A$3.29 -
QM 1 in. Billet Tube Clamp, Black Anodized
Quarter-Max
$45.14This tube clamp clamps around tubing and eliminates the need for welding on the chassis. Accepts our Quarter-Max billet bottle clamp when attachment to round tubing is necessary. Ideal for add-on...QM-219503-1.0B$45.14 -
QM Seat Belt Mount Tab
Quarter-Max
$5.76Fabricate strong and safe seat belt mounting points with this .187" thick 4130 chromoly tab. Precision .440" hole for secure harness attachment. Material .187" 4130 Hole size .440"QM-410066$5.76 -
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 -
90 Degree Gusset Tab
Quarter-Max
$4.1990 Degree Gusset TabSpecifications:• Material: Steel• Thickness: 1/8 in.• Fits 1-1/2 in. tubing• Hole size: 3/8 in.Sold individually.QM-217058A$4.19 -
QM Brakeline Tab - Thin
Quarter-Max
$1.98Use to mount bulkhead fittings to your chassis.Fits 1-1/2" tube 3/8" hole. Thin Brakeline Tab .065” Thk Mild SteelQM-217101-1$1.98 -
Quarter-Max Anti-Roll Bar Kit
Quarter-Max
$262.99 - $269.99Perfect for cars running up to 800 horsepower and up to 4000 pounds!Our Quarter-Max Anti-Roll Bar Kit is the most affordable kit on the market. Featuring a 1 in. .188 in. wall 4130 shaft, available...QM-301195 | QM-301195-1$262.99 - $269.99 -
QM Slim-Line Wheelie Bar Wheel, 6-Spoke
Quarter-Max
$199.48Our innovative QM Slim-Line Wheelie Bar Wheels are made of high strength polyurethane and feature widths of 1-1/4" or 1-5/8" at the hubs, and a slim tread width 1/2". The combination of slim tread...QM-219707-4 | QM-219707-6$199.48 -
QM Extreme Pro Series 2" Splined Anti-Roll Bar Kit, Universal
Quarter-Max
$834.74Our Extreme Pro Series 2” Splined Anti-Roll Bar Kit is the most universal heavy duty splined anti-roll bar kit available on the market today! Engineered to provide superior strength for high...QM-201194 | QM-201194-1$834.74 -
QM Heavy Duty 1-1/2" Splined Anti-Roll Bar Kit, Universal
Quarter-Max
$681.99 - $709.99Our Heavy Duty 1-1/2” Splined Anti-Roll Bar Kit is the most universal heavy duty splined anti-roll bar kit available on the market today! Engineered to provide superior strength for high horsepower...QM-201193 | QM-201193-1$681.99 - $709.99 -
QM Triangle Bracket
Quarter-Max
$3.56 - $5.69This triangle bracket is often used for wing and door strut mounts.QM-217201 | QM-217201A$3.56 - $5.69 -
Wheelie Bar Bracket
Quarter-Max
$7.86Wheelie Bar BracketSpecifications:• Thickness: 1/8"• Material: 4130QM-410031$7.86 -
$4.19 -
Out of stock
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 3/8-16 Threaded Hardened Insert Midplate Clinch Nut
Quarter-Max
$8.39These nuts are made to be pressed into those hard to reach areas at the bottom of the midplate or blocksaver. This allows for easy bolting of the bellhousing.Sold individually.QM-213200$8.39 -
Quarter-Max Rear End Housing Back Brace
Quarter-Max
$100.78 - $157.50Give your Quarter-Max housing the extra support it needs with a back brace. This brace is laser cut and CNC bent to fit the 45" Quarter-Max housings (some notching during installation may be...QM-304105 | QM-304106$100.78 - $157.50 -
QM Fire Nozzle Bracket
Quarter-Max
$6.29Weld this bracket to the chassis to mount your fire system nozzles.Specifications:• Material: 4130• Thickness: .050"• Hole size: 0.440"QM-410277$6.29 -
QM Channel Tab
Quarter-Max
$3.56Weld this channel tab to the roll cage to provide a positive pivoting point for your chute handle or air chute release cylinder. .260" HOLD ID .880" CHANNEL WIDTHQM-217087$3.56 -
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 -
$4.99 -
QM Lower Control Arm Mount Kit
Quarter-Max
$164.84These are the same control arm mounts used at Quarter-Max. The .125" thick brackets are made of 4130. .095" thick gussets for added strength. NAS bolts, jet nuts, AN washers and misalignment bushings...QM-202111$164.84 -
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 Radius Tab, 4130, Fits 1-1/4 in. Tube, 1/2 in. Hole, 1/8 in. Thick
Quarter-Max
$5.24Radius TabSpecifications:• Material: 4130• Fits 1-1/4 in. tube• Hole Size: 1/2 in.• Thickness: 1/8 in.Sold individually.QM-410737$5.24 -
Threaded Adjustable Strut Cup Mount Kit, Standard 4130 Inner
Quarter-Max
$899.99Ever since, racers and builders alike have ranked the Quarter-Max Threaded Adjustable Strut Cup Mount as one of the most popular and beneficial upgrades you can make to your chassis. When considering...QM-201398$899.99 -
QM Extreme Pro Series Wishbone Kit, 1-1/4" Slide Tube
Quarter-Max
$419.99Wishbones are the preferred way to mount and keep the rear end housing in the center of the car. Wishbones offer more strength and less flexibility than a diagonal link.Our Extreme Pro Series...QM-201208$419.99