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Stifflers Suspension transmission crossmembers are engineered to deliver quality, fit, finish, and functionality. At the core of these kits are Stifflers' unique single-tube crossmembers—adding strength and stiffness beyond that of OEM versions, while offering versatility without the excess weight. They also allow more exhaust clearance. To install, simply slide the mounting sleeves and reposition the spacers to cover your application. They work with OEM and aftermarket transmission mounts, and will maintain your current pinion angle. Stifflers Suspension transmission crossmembers include low-deflection polyurethane bushings in the mounts to dampen driveline vibrations and noise, but for racing applications they can be replaced by optional solid bushings. Order the crossmembers designed for fitment on your make and model.
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$189.95
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$299.95
$170.96
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$269.96
On Sale
Stifflers Suspension weld-on subframe connectors are engineered to be stiff, lightweight, and easy to install. These full-length connectors are manufactured from 1.5 in. x 2 in. x .083 in. rectangular tubing. They are optimized using CAD/CAE software to provide the ultimate in stiffness, reduced weight, and maximized surface area between the subframe and connector. Stifflers subframe connectors feature crimped and welded tube ends to seal out moisture, while also increasing strength, and a laser-cut cross brace that reduces free span, reinforces the floor pan, and minimizes required welding during installation. All is given an industrial-grade powdercoat for long life. Welding areas are pre-masked, so no removal of powdercoat is needed before installation--a real time-saver!
( 10 )
$189.95
$170.96
On Sale
Stifflers driveshaft safety loops are engineered to exceed NHRA regulations. These one-of-a-kind driveshaft safety loops will save you and your investment from the destructive effects of a broken driveshaft. Quick and easy bolt-in application requires no drilling or welding for a no-hassle installation. Stifflers driveshaft safety loops will work with most automatic and manual transmissions, so you can launch hard with confidence! Stifflers driveshaft safety loops feature: * Lightweight, but strong design * Works with aluminum driveshafts and most aftermarket exhausts * Powdercoated for long life * Complete with all hardware * Includes spacer plates to maintain correct driveshaft angle (where applicable)
( 10 )
$149.95
$134.96
On Sale
Stifflers Suspension web braces tie together their full-length subframe connectors and stiffening rails, creating the ultimate in chassis stiffening! A key component in their 1979-2004 modular FIT Systems, these individual black powdercoated steel frames provide a structurally engineered web network for additional strength and stiffness. Their installation is easy with the included Slide-2-Size mounting brackets. Stifflers Suspension web braces feature: * Slide-2-Size mounting; simply slide bracket into place and weld, for a custom fit every time * Design optimized using CAD/CAE software combined with real-world test data * Made of 1 in. x .065 in. tubing to maximize stiffness and strength while reducing weight * TIG-welded for superior strength * Considerably increased side impact safety * Works with any aftermarket square or rectangular full-length subframe connectors * Engineered for no loss of ground clearance and no need to relocate fuel or brake lines * No floors to cut or interior to remove * Pre-masked areas for welding require no removal of powdercoat before installation * Industrial-grade powdercoated for long life
( 2 )
$284.95
$256.46
On Sale
Stifflers Suspension transmission mounts and adapters provide the right geometry. They are available for a variety of transmission and chassis combinations--including a version designed to be used in conjunction with Stifflers polyurethane GM transmission mounts to install a TH-350, TH-400, or Powerglide transmission in Mustangs. Other designs offered include versions to fit Ford 6R80 automatic transmissions and Viper specification T-56 manual transmissions to earlier Mustangs. They are all designed to maintain proper driveline angles.
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$32.95
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$59.95
$29.66
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$53.96
On Sale
Stifflers Suspension stiffening rails are more than just a place to put your jack. Installed behind the rocker panel pinch-weld lip, these multi-taskers add strength and stiffness to your Mustang's chassis, as well as provide a safe and solid foundation for your jack. They are manufactured of 1 in. x 1.5 in. x .083 in. rectangular tubing for great strength-to-weight ratio for improved handling. Stifflers Suspension stiffening rails feature pre-masked areas for welding; this means no powdercoat to grind away, so the installation is quick and easy. They are a must for all track and lowered cars. Stifflers stiffening rails also feature: * Plastic end plugs to help keep moisture out * Industrial-grade powdercoat for long life, to outlast the vehicle * Added level of safety in event of side impact * Can be used alone or with Stifflers' Fully Integrated Technology (FIT) system
( 4 )
$94.95
$85.46
On Sale
Stifflers Suspension Mustang FIT (Fully Integrated Technology) systems offer a proven way to keep your Mustang's muscles fit! The FIT system integrates the front and rear subframes and ties them into the rocker panels to form a triangulated web of strength and stiffness that helps keep your car in shape for improved handling, launches, and ride quality. The strong steel stiffeners beef up your Mustang for an increased range of suspension tuning and overall performance. Twisting and bending is good conditioning for humans--not vehicles. The best exercise for your Mustang is Stifflers FIT system. Stifflers Mustang Fit System benefits include: * Transfers more power to the ground, not wasting it twisting and bending the chassis * Launches straighter * Stiffer chassis reduces or eliminates interior rattles and extends the life of the vehicle * Weld locations are free of powdercoat--no removal of powdercoat required before installation * Non-intrusive design; no floors to cut, interior to remove, or lines to relocate * Tube ends are sealed to keep out moisture * Ground clearance remains unchanged * Increases side impact safety * Can be used with factory convertible braces with only slight modifications
( 3 )
$354.95
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$569.95
$319.46
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$512.96
On Sale
Stifflers Suspension transmission crossmember extension brackets are designed to work with Stifflers' unique single tube crossmembers. These adjustable bolt-on mounting bracket kits allow the optimum placement of their crossmembers with no modifications required. They are part of the range of Stifflers crossmembers that feature the strength, adjustability, and good looks that make them industry leader.
Not Yet Reviewed
$59.95
$53.96
On Sale
Don't be cramped when putting your beast through its paces! Stifflers Suspension seat rail extenders reposition the front seats further to the rear, providing tall drivers and passengers additional leg room. Like all Stifflers' products, these kits are designed for functionality, appearance, and ease of installation!
Not Yet Reviewed
$109.95
$98.96
On Sale
Stifflers Suspension lower chassis braces dramatically increase the strength and stiffness of the front chassis area. Available for both factory and aftermarket K-members, this additional stiffness minimizes flexing to help maintain correct front suspension geometry while under load. The result is tighter steering response and more predictable handling under cornering and braking. Where applicable, Stifflers' lower chassis braces can be combined with their Spider braces (sold separately) to completely integrate the front and rear chassis sections for unprecedented car control. Features include: * Manufactured from high-strength tubing to maximize stiffness and strength while reducing weight * Design optimized using CAD/CAE software combined with real-world test data * Industrial-grade powdercoated for long life * Select models available that will work with aftermarket long tube headers * Includes hardware and rod ends (where applicable) * Depending on application, welding and drilling may be required
( 2 )
$119.95
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$189.95
$107.96
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$170.96
On Sale
Stifflers Suspension solid transmission crossmember bushings are for those who desire to have a solid mounted crossmember. These high-strength nylon bushings are lighter than aluminum and will hold up against even the highest horsepower cars. They're used in place of Stifflers' normal polyurethane bushings to decrease any potential movement between the body and the crossmember for those who are using motor plates. Order the bushings recommended for your application.
Not Yet Reviewed
$24.95
$22.46
On Sale
Stifflers Suspension transmission crossmember spacers assist you when adding a Tremec to your Mustang. Popular TKO transmissions have a shorter vertical mounting pad height compared to most others. These Stifflers spacers will maintain the proper driveline angle when installing a TKO in your Mustang, while using one of their transmission crossmembers. Retain the correct geometry with Stifflers Suspension TKO install kits.
( 3 )
$19.95
$17.96
On Sale
Get it centered and keep it there ... Stifflers Suspension panhard rods provide quick, easy-access, on-car adjustability to center and keep the rear end in place under the most demanding driving conditions. Their race-inspired design offers superior stiffness and weight savings. Greaseable fluted polyurethane bushings minimize side-to-side movement and assure continued quiet operation. A "must have" for lowered cars, Stifflers adjustable panhard bars are powdercoated for long-lasting good looks.
Not Yet Reviewed
$159.95
$143.96
On Sale
Stifflers Suspension strut tower braces add strength and stiffness to the front end by integrating the strut towers and firewall, greatly reducing flex and alignment changes caused by front suspension loads during cornering and braking. Reducing this flex provides increased steering response and stability, giving you improved overall handling and control. Features include: * Engineered to be used with most 3- or 4-bolt caster/camber plates * Clears most aftermarket cold-air and supercharger inlets * Manufactured of DOM tubing to maximize stiffness and strength while reducing weight * Triangulated mounting is far stiffer than standard 2-point braces * Design optimized using CAD/CAE software combined with real-world test data * TIG-welded for superior strength * Industrial-grade powdercoated for long life
( 1 )
$199.95
$179.96
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