Ladder Bars & Components
Launch harder and maintain straight-line stability with drag racing ladder bars and components from Quarter-Max. We offer heavy-duty ladder bar kits, weld-in crossmembers, track bars, safety loops, and mounting brackets engineered to optimize rear suspension geometry, increase traction, and handle high horsepower down the quarter-mile.
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QM 2" x 3" Dropped Crossmember
Quarter-Max
$90.29Fabricating a rear frame on a Pro Street or Drag Race car is easier and looks more professional with a 2" x 3" dropped crossmember. The sturdy 2" x 3" .083” steel crossmember is mandrel bent on CNC...QM-302105$90.29 -
QM 2" x 3" Dropped Crossmember with Ladder Bar Brackets
Quarter-Max
$138.59Fabricating a rear frame on a Pro Street or Drag Race car is easier and looks more professional with a 2" x 3" dropped crossmember. The sturdy 2" x 3" .083” steel crossmember is mandrel bent on CNC...QM-302109$138.59 -
QM 3/4" Extreme Ladder Bar Adjusters, 4130
Quarter-Max
$53.54Convert your standard ladder bars into adjustable ladder bars or replace old adjusters with our ladder bar adjuster kit. Our adjusters feature wrench flats for easy adjustment and come with jam nut...QM-302121$53.54 -
QM 3/4" Ladder Bar Adjusters, 4130
Quarter-Max
$44.09Convert your standard ladder bars into adjustable ladder bars or replace old adjusters with our ladder bar adjuster kit. Our adjusters feature wrench flats for easy adjustment and come with jam nut...QM-302121-3$44.09 -
QM 3/4" Ladder Bar Adjusters, Mild Steel
Quarter-Max
$36.74Convert your standard ladder bars into adjustable ladder bars or replace old adjusters with our ladder bar adjuster kit. Our adjusters feature wrench flats for easy adjustment and come with jam nut...QM-302121-1$36.74 -
QM 5/8" Ladder Bar Adjusters, Mild Steel
Quarter-Max
$33.59Convert your standard ladder bars into adjustable ladder bars or replace old adjusters with our ladder bar adjuster kit. Our adjusters feature wrench flats for easy adjustment and come with jam nut...QM-302121-2$33.59 -
QM Double Adjustable Ladder Bars
Quarter-Max
$382.19 - $443.99All of our Quarter-Max ladder bars feature an exclusive Quarter-Max design to eliminate the binding caused by adjustment of the heims. Our bars are designed to always have the heims parallel to each...QM-302102-x$382.19 - $443.99 -
QM Dropped Tubular Crossmember, 1-3/4 in. OD, 3 in. Drop, 4130
Quarter-Max
$178.49Dropped Tubular Crossmember, 1-3/4 in. OD, 3 in. Drop, 4130Specifications:• 3 in. drop center• Width: 54-1/8 in.• Material: 4130• Diameter: 1-3/4 in. OD• Wall thickness: .095 in. wallAlso available...QM-302107$178.49 -
QM Dropped Tubular Crossmember, 1-3/4 in. OD, 3 in. Drop, Mild Steel
Quarter-Max
$94.49Dropped Tubular Crossmember, 1-3/4 in. OD, 3 in. Drop, Mild SteelSpecifications:• 3 in. drop center• Width: 54-1/8 in.• Material: Mild steel• Diameter: 1-3/4 in. OD• Wall thickness: .134 in. wallAlso...QM-302106$94.49 -
QM Dropped Tubular Crossmember, 1-3/4 in. OD, 3 in. Drop, Mild Steel, with Brackets
Quarter-Max
$104.99Our dropped tubular crossmember is the economical solution to add a crossmember and front ladder bar brackets to your project.Dropped Tubular Crossmember with Brackets, 1-3/4 in. OD, 3 in. Drop, Mild...QM-302110$104.99 -
QM Ladder Bar Chassis Brackets for 2" x 3" Rectangle Tube
Quarter-Max
$100.76Quarter-Max's ladder bar brackets are manufactured in-house to high quality specifications with precise hole locations and smooth profiles. Specifications:• Thickness: 1/4"• Material: Mild...QM-410216$100.76 -
QM Ladder Bar Chassis Brackets for Round Tube Back-Halfs
Quarter-Max
$100.76Quarter-Max's ladder bar brackets are manufactured in-house to high quality specifications with precise hole locations and smooth profiles. Specifications:• Thickness: 1/4"• Material: Mild steel•...QM-410216-1$100.76 -
QM Ladder Bar Diagonal Link Kit
Quarter-Max
$99.74Diagonal link kits are a very simple method to center the rear end.The Ladder Bar Diagonal Link Kit comes with 1" O.D. x .058" wall 4130 tube, mild steel rod ends, steel clevises with a 5/8" hole and...QM-201109-2$99.74 -
QM Ladder Bar Front Crossmember Brackets for 1-3/4" Round Tube, 4 Hole
Quarter-Max
$62.96Quarter-Max's ladder bar brackets are manufactured in-house to high quality specifications with precise hole locations and smooth profiles. Specifications:• Thickness: 3/16"• Material: Mild steel•...QM-410170$62.96 -
QM Ladder Bar Front Crossmember Brackets for 1-3/4" Round Tube, 5 Hole
Quarter-Max
$67.16Quarter-Max's ladder bar brackets are manufactured in-house to high quality specifications with precise hole locations and smooth profiles. Specifications:• Thickness: 3/16"• Material: Mild steel•...QM-410072$67.16 -
QM Ladder Bar Front Crossmember Brackets for 1-5/8" Round Tube, 4 Hole
Quarter-Max
$62.96Quarter-Max's ladder bar brackets are manufactured in-house to high quality specifications with precise hole locations and smooth profiles. Specifications:• Thickness: 3/16"• Material: Mild steel•...QM-410170-1$62.96 -
QM Ladder Bar Front Crossmember Brackets for 1-5/8" Round Tube, 5 Hole
Quarter-Max
$67.16Quarter-Max's ladder bar brackets are manufactured in-house to high quality specifications with precise hole locations and smooth profiles. Specifications:• Thickness: 3/16"• Material: Mild steel•...QM-410072-1$67.16 -
QM Ladder Bar Front Crossmember Brackets for 2" x 3" Rectangle Tube
Quarter-Max
$96.56Quarter-Max's ladder bar brackets are manufactured in-house to high quality specifications with precise hole locations and smooth profiles.Specifications:• Thickness: 1/4"• Material: Mild steel•...QM-410171$96.56 -
QM Ladder Bar Housing Brackets, 180°
Quarter-Max
$67.16Quarter-Max's ladder bar housing brackets are manufactured in-house to high quality specifications with precise hole locations and smooth profiles.This bracket is included in our ladder bar kit...QM-410214$67.16 -
QM Ladder Bar Housing Brackets, 180° with Adjustable Shock Mount Holes
Quarter-Max
$146.96Quarter-Max's ladder bar housing brackets are manufactured in-house to high quality specifications with precise hole locations and smooth profiles.This bracket features adjustable shock mount holes...QM-410218$146.96 -
QM Ladder Bar Housing Brackets, 360°
Quarter-Max
$155.36 - $211.96Quarter-Max's ladder bar housing brackets are manufactured in-house to high quality specifications with precise hole locations and smooth profiles.These brackets add strength by completely encasing...QM-410187-x$155.36 - $211.96 -
QM Ladder Bar Housing Brackets, 360° with Threaded Shock Mounts
Quarter-Max
$167.99 - $187.99Upgrade your housing brackets to this unique Quarter-Max 360° design. These brackets add strength by completely encasing the axle tube. Integrated wheelie bar mounts and lower shock mounts mean less...QM-302120 | QM-302122$167.99 - $187.99 -
QM Ladder Bar Lower Hoop Mount
Quarter-Max
$9.44Ladder Bar Lower Hoop MountSpecifications:• Thickness: 3/16"• Material: Mild steelSold each.QM-410217$9.44 -
QM Ladder Bar Round Tube Back-Half Kit
Quarter-Max
$1,018.49Our 4130 round tube ladder bar back-half kit includes 1-5/8 in. OD x .083 in. W frame rails, 1-3/4 in. OD x .095 in. front crossmember, upper shock mount, cross bracing, and a 180 degree driveshaft...QM-302117$1,018.49 -
QM Ladder Bar Round Tube Frame Rails, 1-5/8 in. OD x .083 in. W 4130
Quarter-Max
$468.28Ladder Bar Round Tube Frame Rails, 1-5/8 in. OD x .083 in. W 4130Sold in pairs. Brackets not included.This item will have a discounted oversize fee of $80.00 when shipped via ground delivery to the...QM-302108-1$468.28 -
QM Ladder Bar Round Tube Frame Rails, 1-5/8 in. OD x .083 in. W 4130, with Welded Chassis Brackets
Quarter-Max
$634.18Ladder Bar Round Tube Frame Rails, 1-5/8 in. OD x .083 in. W 4130, with Welded Chassis BracketsSold in pairs. Chassis brackets are welded to the frame rails.This item will have a discounted...QM-302109-1$634.18 -
QM Ladder Bar Round Tube Welded Back-Half
Quarter-Max
This item ships truck freight only. Please call 309-343-7575 to order.Our 4130 round tube ladder bar back-half includes 1-5/8" .083" frame rails, 1-3/4" .095" front crossmembers, upper shock mount,...QM-302115 -
QM Ladder Bar Safety Hoop
Quarter-Max
$12.59This ladder bar safety hoop is used to prevent rod end failure. Secures ladder bar from to ground.Specifications:• Thickness: 3/16"• Material: Mild steelSold each.QM-410210$12.59 -
QM Ladder Bar Support Gusset
Quarter-Max
$34.64Ladder Bar Support GussetSpecifications:• Thickness: 3/16"• Material: 4130QM-410215$34.64 -
QM Pro Series Double Adjustable Ladder Bar Kit
Quarter-Max
$692.99 - $799.99Quarter-Max's Pro 4130 Double Adjustable Ladder Bars are built with 4130 1-1/4” top tubes and 1-3/8” bottom tubes with an original QM design to eliminate the side load placed on the heims which can...QM-302103-x$692.99 - $799.99 -
QM Pro Series Ladder Bar Hoop Bracket
Quarter-Max
$8.39Pro Ladder Bar Hoop BracketSpecifications:• Thickness: 3/16"• Material: Mild steelSold each.QM-410212-1$8.39 -
QM Universal Ladder Bar Rails
Quarter-Max
$438.88The perfect way to narrow the rear of your chassis to accept extra-wide racing tires. Our frame rails are of universal design, making them adaptable to any car from Pro Street to Drag Race. The...QM-302108$438.88 -
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