6404 – 1973-1987 GM C10 Handling and Lowering Kit, Stage 4

UMI’s Stage 4 Kit transforms your squarebody with a 4.5″/6″ drop, #cornermax A-arms, coilovers, and Viking shocks. Tunable for street or track, it improves handling, stance, and control while retaining stock brakes. Made in the USA.

Details

UMI’s Stage 4 Handling and Lowering Kit takes your squarebody to the next level of performance and drivability. Engineered for serious enthusiasts, this complete package combines #cornermax upper and lower A-arms to increase caster and improve straight-line stability while enhancing cornering precision. A tall upper ball joint improves camber gain for superior tire contact and predictable handling, and the design allows the shock and spring to be removed at the track without disassembling the spindle for quick and easy setup changes. The UMI/Viking coilover system paired with CP4S4 drop spindles delivers a full 4.5″ front drop with adjustable ride height and spring rate tuning for ultimate control, while the lowering spindles retain stock GM brakes and bearings for simple installation and serviceability. A heavy-duty 1-3/8″ tubular front sway bar keeps body roll in check, and the UMI rear flip kit provides a 6″ rear drop for a level, aggressive stance. Out back, a three-way adjustable 1″ Pro-Tour style sway bar allows fine-tuning of rear roll stiffness, working together with Viking double adjustable shocks to balance street comfort and track capability. Whether it’s the Power Tour, your daily commute, or an autocross course, this kit delivers proven results. Proudly Made in the USA, UMI’s Stage 4 kit combines a 4.5″/6″ drop with advanced geometry and precision components to transform your squarebody into a true corner-carving machine—with the looks, stance, and performance to match.

Description

Stage 4 Kit: 4.5″/6″ drop, #cornermax A-arms, coilovers, Viking shocks.

Short Description

Handling Kit

Notes

All Track Pack systems now come standard with our 10 foot Super Flex coiled hose. It packs away faster than the 30 ft hose and we found the Track Pack works best with a short hose when the Power Tank is close to you, reducing the chance of a pulled hose knocking over the Power Tank. The 30 ft coiled hose may still appear in images. The 10 lb. Track Pack Power Tank is based on our best selling Package B but trades the hard mount bracket for a padded Speed Bag. It is the perfect Power Tank size for trail rigs with up to 35 in. tires and includes accessories not found in the Package A that will make using your Power Tank faster and more convenient. A Power Tank is the fastest and most powerful portable air solution. With the power of CO2 you can air up faster, reseat bigger tires (tested up to 46 in.) safely, and run air tools at full power. To see what Power Tank performance looks like for your tire size, check out our tire air up chart. Based on tire size and amount of air you are adding, it will tell you how many tires you can fill on one tank and how quickly you can do it. As an example, you can air up from 15 psi to 25 psi on a 35 in. tire in 19 sec. and you can air up 30 tires before needing to refill your 10 lb. Power Tank! The same size tank can also remove 360 lug nuts using a 1/2 in. impact wrench before empty. When it's empty, take your tank to a local fire extinguisher service shop, welding supply store, or beverage carbonic shops, and have it refilled for about $15-$25. The secret to this performance is Power Tank's Super Flow Regulators, adjustable regulator designed to maximize output pressure and flow rate simultaneously. Power Tanks boast a 45 cfm flow rate compared to the 5-6 cfm found in high-end 12v compressors. All Power Tank regulators are guaranteed to never freeze clog and are backed with a limited lifetime warranty. This is the only portable air system that will outlive the vehicle it's mounted to. This incredible system weighs only 26 lb. when full and is portable and easily moved from vehicle to vehicle, walked down the trail to help a broken rig, or transported from the chase truck to the race car all without power cables or long air hoses to run. This Track Pack system includes everything you need to run air tools with our advanced universal safety Super Coupler and air up tires through a dedicated HD Tire Inflator with Gauge. It also includes a Speed Bag for easy transport of your Power Tank, hose, and accessories. Includes: Super Flow Regulator HP250i or XP400 Pro Power Grip Guard Handle 10 lb. Armorcoat CO2 Cylinder Tank Boot Super Flex Hose 10 ft. Coiled Super Coupler 10 lb. Speed Bag HD Tire Inflator with Gauge You save $80 by bundling the accessories in Package B Limited Lifetime Warranty 5 year warranty

Application Summary

Whether you're a mechanic, carpenter, pit crew, or a home improvement guy who knows the value of well built equipment, this is the kit for you. The Workman Power Shot System is the most portable air system on the market and will allow you to run air tools in even the most cramped work areas. Clip (2) 20 oz. CO2 bottles to your belt with the included belt holsters and keep four on standby, ready to swap into rotation in seconds. Each bottle is equivalent to a 50 gal. air tank at 120 psi. That translates to 1140 8D nails combined, more than enough for smaller jobs. Trackside, you're looking at removing over 250 lug nuts from a 1/2 inch impact wrench; that's a lot of tires. Our Sidearm adjustable regulator uses the same Super Flow technology as our full size Power Tanks, allowing you to dial the pressure exactly for the tool or task at hand. The included ten foot hose moves with you and the high pressure rated swivels at both ends prevent tangling. This system works great with all of your air tools: 1/2 inch impact, nail gun, rivet gun, grease gun, caulking gun, tire inflator, etc. The Power Shot does not require electricity, extra air lines, and it runs completely silently. Great for contractors that have to work around clients and much easier than transporting and setting up a compressor. Compare the size and bulk of a compressor with our six bottle system that fits in two Dr. Style tool bags. The bottles can be refilled at a sporting goods or paintball shop for about $4 each or you can refill them yourselves with our Power Shot Filling Station (ITT-2000). All Workman packages are used by Helifire for their Pyroshot systems. Note: Pro Series 400 psi Regulator not recommended for use with nail guns. Details: (6) 20 oz. Power Shot Bottles with On/Off Valves Sidearm 160 psi Regulator 400 psi Pro Regulator Holster with Carabiner Bottle Sleeve with Pocket Clip 10 ft. Braided Coiled Hose Coupler Fittings Tire Air Chuck Small Digital Tire Pressure Gauge (0-100 psi) (2) Carry Bags (6) Valve Caps Mini Tire Plug Kit

Features

• UMI #cornermax upper and lower a-arms increase caster and improve straight line stability
• Tall upper ball joint improves camber gain
• Remove shock and spring at the track without disassembling the spindle
• UMI/Viking coilover and CP4S4 spindle lower the front 4.5″ with ability to fine tune ride height and spring rate
• Lowering spindles accept stock GM brakes and bearings
• Heavy duty 1-3/8″ tubular front sway bar
• UMI flip kit on rear axle yields a 6″ drop
• Three way adjustable 1″ Pro-Tour style rear sway bar
• Viking double adjustable shocks work great on street or track
• Power Tour, daily driver and corner carver proven
• Made In USA

Product Info

Available Packages

Fitment