Massive Speed System Massive Traction Satisfaction Adjustable RaceSpec complete kit 68-72 GM A Body MASS-16333.7

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Specifications:

BrandMassive Speed System
Part NumberMASS-16333.7

Specifications:

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Race spec complete kit Adjustable Lower Rear Control Arms, Upper Rear Control Arms and Control Arm Braces. When your ready to take a true step above the guys in the other lane, the choice is simple Massive RaceSpec series suspension components! Replaced are all flexible components for the best in accurate torque transfer! And now. It's never been easier or more affordable to make your A body STICK!!! We've grouped our 3 best selling rear suspension components into to one set - a simple choice designed to work together - and easy on the wallet!!! You SAVE MONEY on the combined purchase AND pay less shipping!!! Save over $36 vs. buying separately and at least $20-$30 in shipping costs. And now a word from the stars of the show: #1 Adjustable Lower Control Arms -. Stock lower control arms on the A Body are of an extremely flimsy stamped sheet metal construction. Soggy rubber bushings complete the recipe for unwanted wheel hop, deflection and flex.Massive has created a stronger solution. Huge 1.5" heavy wall steel tubing can harness even the highest HP load with ease. Durable and stable construction transfers your hard earned torque where it belongs - the pavement. Fully TiG welded. Featuring: Monster 1.5".120" wall Alloy steel tig welded body will handle ANY power level. Billet BIG O.D. Custom machined rod end step bushings Not off the shelf tiny pieces!Dare to compare! HD construction made just for this purpose where rotary motion is most critical but torque loads are great. Won't let your factory stamped steel brackets twist or bend. BIG HP cars will tear lesser pieces to shreds. Aurora 3/4in VCAM 21150 lb Load capacity PTFE Composite race spherical rod ends - super strength yet metallic contact isolated - NO NOISE! LONG LIFE! NO LUBRICATION NECESSARY!. Fully adjustable ON CAR for limitless fine tuning. Includes complete HARDCORE HARDWARE kit. All grade 8 zinc and yellow plated with nylock nuts. The other guys want you to pay extra for it!!! Quality made IN HOUSEright here in THE USA!!! Next up!!! #2 Adjustable Upper Control Arms -. Featuring: Fully boxed 1/4" steel laser cut bracketry. Billet BIG O.D. Custom machined rod end step bushings Not off the shelf tiny pieces! Dare to compare! HD construction made just for this purpose where rotary motion is most critical but torque loads are great. Won't let your factory stamped steel brackets twist or bend. BIG HP cars will tear lesser pieces to shreds. Full T6061 billet aluminum.220" wall tie rod is not only stronger than OE stamped piece, but also lighter in weight! Machined flats for tool usage. Aurora 5/8in VCAM 15,000 lb Load capacity PTFE Composite race spherical rod ends - super strength yet metallic contact isolated - NO NOISE! LONG LIFE! NO LUBRICATION NECESSARY! Years of exhausting research at the race track and on the street have led us to these "cost-no-object" ends!!! Fully adjustable ON CAR for limitless fine tuning. Quality made IN HOUSE right here in THE USA!!!Includes Massive's HARDCORE HARDWARE kit (the competitors DON'T!). Only the finest 170,000 PSI Grade 8 bolts with Nylock nuts and plated washers. Strong enough for all power levels and replaces your weak, rusted stock stuff. And finally: #3 Adjustable Control Arm Brace -. Add extra rigidity to your chassis in key suspension pickup points! Result is superior traction and far less fatigue on thin body/frame mounts!. Unique centrally mounted opposing thread jack screw allows the Massive braces to be fully adjustable ON CAR for ease of install AND allows preload!!! Others simple threaded rod mean the braces must be removed to adjust and no preload can be dialed in. These are the finest braces available for your A Body. Superior in function to original equipment stamped braces found on factory Hi-Po cars - Big block, W30, 442, GTO cars.Fully TIG welded. Prominent Massive logo so people know your using the best. As usual, these braces are MADE IN THE USA. 1" alloy steel construction - fully TIG welded. Includes Massive's HARDCORE HARDWARE kit - our competitors DON'T. Only the finest 170,000 PSI Grade 8 bolts with Nylock nuts and plated washers. Strong enough for all power levels and replaces your weak rusted stock stuff.Don't drop the hammer without em!!! And that rounds out our cast. Save some dough and make you A Body handle and HOOK UP!!! As always MADE IN HOUSE RIGHT HERE IN THE USA!!! Fitment. 1968-1972 Buick GS. 1968-1972 Buick Skylark. 1968-1972 Chevrolet Chevelle. 1968-1972 Chevrolet EL Camino. 1968-1972 Chevrolet Malibu. 1968-1972 Chevrolet Monte Carlo. 1968-1972 Oldsmobile 442. 1968-1972 Oldsmobile Cutlass. 1968-1973 Pontiac GTO. 1968-1973 Pontiac Lemans.

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Buyer's Guide

Control Arm Buyer's Guide

Control arms, also known as A-arms, are fundamental suspension components that connect the steering knuckle to the chassis. They allow for the wheel to move up and down, while supporting the vehicle's weight and maintaining proper wheel alignment. Depending on your suspension design, your vehicle may use both upper and lower control arms, or only a lower control arm, as in MacPherson strut suspensions.

Aftermarket control arms allow enthusiasts to correct suspension geometry, increase material strength, and improve suspension precision. This guide covers everything you need to know to confidently choose the right control arms for your build.

Why Upgrade Your Control Arms?

A control arm's geometry and bushing material affects your vehicle's handling, making them a worthwhile upgrade for anyone looking to dial in suspension performance. Common reasons you would replace or upgrade your control arms include:

Geometry Correction: Lowering a vehicle shifts the control arms outside their ideal operating range. Aftermarket arms let you correct this and provide control over caster and camber to restore proper handling.
Suspension Precision: Upgraded arms often feature stiffer bushings that reduce deflection (unwanted movement) under heavy cornering loads, improving steering precision.
Increased Strength: Aftermarket arms, especially forged or tubular steel versions, are designed to withstand the high stresses of track or off-road use that might bend a factory stamped-steel unit.
Bushing Longevity: Replacing old, cracked rubber bushings with modern materials restores the tight feeling of a new car.

How Do Control Arms Work?

Control arms connect at two points: the inboard side mounts to the chassis via bushings, and the outboard side connects to the steering knuckle via a ball joint which allows for rotational movement.

The number of control arms present depends on your vehicle's specific suspension configuration (double wishbone, MacPherson, etc). In a double wishbone suspension, the upper and lower control arms work together to precisely control wheel motion and camber throughout the full range of suspension travel. In a MacPherson strut system, a single lower control arm handles this role, with the strut acting as the upper control arm.

Adjustability

One of the primary reasons enthusiasts choose aftermarket control arms over OEM replacements is the availability of adjustable designs. While factory arms are typically a fixed length, many performance arms feature threaded adjusters or sliding ball joints that allow for fine-tuning of alignment.

Camber Adjustment: Allows you to tilt the top of the tire inward (negative camber) for more tire contact through corners and better cornering grip.
Caster Adjustment: Helps with straight-line stability and steering feel, specifically the way the wheel self-centers after a turn.

Control Arm Materials

The strength of your control arm is primarily determined by its material. Some of the most common include:

Stamped Steel: The most common factory control arm material. Cost-effective and strong enough for everyday use, but heavier and less refined than performance alternatives.
Cast/Forged Steel: Offer significantly improved strength over stamped steel, making it a solid choice for heavier vehicles and performance applications. Forged steel is generally stronger than cast.
Aluminum: Available in cast or forged form, with forged being the stronger option. Popular for its weight savings and corrosion resistance, making it a common choice on performance or track builds.

Bushing Material

The bushing is the interface between the control arm and the chassis. Your choice here determines how durable and responsive your suspension is. Stiffer materials offer more precision at the cost of increased noise and vibration transmitted to the cabin.

Rubber: Excellent ride comfort and noise isolation, but can deflect under load. Rubber bushings are the right choice for daily drivers prioritizing a smooth, comfortable experience.
Polyurethane: Stiffer and longer-lasting than rubber, with noticeably better performance under load. Some additional vibration makes it into the cabin, but overall comfort remains acceptable for street use. A solid all-around choice for performance street cars.
Spherical Bushings: Offer maximum precision by eliminating deflection entirely, maintaining consistent suspension geometry under all conditions. Ideal for dedicated track cars, but poorly suited for street use due to harshness, noise, and a shorter service life.

Conclusion

Control arms play a critical role in determining how your suspension behaves, affecting everything from alignment and tire wear to steering feel and cornering performance. Whether you're replacing worn factory components, correcting geometry after changing ride height, or building a dedicated performance setup, the right control arms can significantly improve the consistency and responsiveness of your suspension. For the best results, make sure to get an alignment after installation. No matter your application, you can find all the parts you need and design your build on RideBuilder.