METALCLOAK
Reference: MC8058
Lift Kits
MetalCloak Lock-N-Load Radius Arm Suspension Lift Kit 4.5", RAM 2500 Diesel 2019+
Lock-N-Load Radius Arm Suspension Lift Kit 4.5", RAM 2500 Diesel 2019+ — a genuine MetalCloak part, no. 8058. Fitment according to MetalCloak: RAM 2500, 2021–current. Coating: gold zinc.
MetalCloak Lock-N-Load Radius Arm Suspension Lift Kit 4.5", RAM 2500 Diesel 2019+ (part no. 8058)
A RAM 2500 on its factory radius arm suspension is composed on tarmac, but off-road it runs out of travel and traction quickly. The complete MetalCloak system replaces the arms, coils, track bars and bump stops with one tuned package designed to keep the truck civilised for daily driving.
Fitment RAM 2500, 2021–current | Coating gold zinc | Part number 8058 |
What is in the kit
- Front lower long arms
- Lock-N-Load or radius arm
- Front upper radius control arm
- Rear Duroflex control arms
- Front and rear True Dual Rate coils
- Front coil perches
- Front track bar bracket
- Rear track bar bracket
- Front bump stops
- Rear bump stops
- Front sway bar links
- Pitman arm
Options offered by MetalCloak
This listing is the base configuration. MetalCloak offers paid options for it — contact us for a quote if you need one of them:
- Shock type — stock shocks with the extension kit, RockSport Red shocks, RockSport BLACK reservoir shocks
- Rear: articulation or payload — rear True Dual Rate 4.5" Max Flex coils instead of the Max Payload spacers
- Front upper arm — Lock-N-Load disconnecting arm instead of the standard one
- Front track bar — front Durotrak track bar
- Rear track bar — rear Durotrak track bar
Duroflex joint with Kevlar fibre
Duroflex is a patented joint made from a proprietary vulcanized elastomer with DuPont Kevlar fibre compounded into it. It combines the behaviour of a rubber bush and a spherical joint: it damps vibration and self-centres, while giving — according to MetalCloak — over 34 degrees of misalignment per joint, i.e. over 68 degrees per control arm. The outer surface of the bushing works as a bearing, so the arm does not bind at full articulation. The joint is maintenance-free and rebuildable, so after years it is the insert that gets replaced, not the whole arm. Kevlar bushings are marked with an "M" on the outer surface.
True Dual Rate coils
True Dual Rate coils have one of the longest free lengths on the market, which keeps the wheel on the ground longer during articulation. The dual-rate design solves the classic lift problem: a single low-rate spring would be too soft and every load would change ride height. Here the first part of the travel is soft and the rate rises as the spring compresses. The coils that close up form a "virtual bucket" that lowers the spring seat and limits buckling.
Durotrak bushing
Durotrak is a patented two-piece NVH bushing made from a proprietary elastomer. The two halves thread together, so no press is needed to fit it. The bushing damps vibration reaching the steering wheel and sharpens steering response. The bar itself is solid 4130 chromoly, shaped to clear the axle at both full compression and full droop.
Technical data from MetalCloak
| Long arm control arms | 2.0" OD x .310" Wall DOM Steel Tubing |
| Optional Lock-N-Load | 3.0" OD x .120" Wall DOM Steel Tubing |
| Control arms | 1.5" OD x .187" Wall DOM Steel Tubing • 2.0" OD x .310" Wall DOM Steel Tubing |
| Duroflex joint | proprietary vulcanized elastomer with DuPont Kevlar fibre |
| Coils | high-tensile chrome steel |
| Front coil pads | 90A polyurethane |
| Front coil perches | 4.5" OD x .120" Wall Steel Tubing • 3/16" Hot Rolled Steel Plate |
| Front track bar bracket | 1/4" Hot Rolled Steel |
| Rear track bar bracket | 1/4" Hot Rolled Steel |
| Rear bump stops | 3" x 3" x .188" Wall Steel Tubing |
| Sway bar links | 1/2"-13 x 12.25" Length |
| Pitman arm | steel |
| Coating | gold zinc |
Installation
- Installation difficulty: moderate
- Body modification: none, bolt-on
- Install time per MetalCloak: 15–18 hours
Manufacturer installation instructions: open the instructions.
Manufacturer notes
- Diesel: this suspension system is intended for diesel RAM 2500 trucks.
- True Dual Rate coils: MetalCloak does not recommend powder coating the coils; see the installation instructions.
- Alignment: MetalCloak recommends having a suspension specialist align the vehicle once the suspension is installed.
- Complete system: MetalCloak supplies this kit only as the complete system shown. Components cannot be removed, replaced or customised, although every component is also available separately.
- Returns: MetalCloak does not accept returns of individual components taken out of a complete system.
MetalCloak states two different year ranges on this product: "2019+" in the name and "2021 – current" in the specification table. For a 2019 or 2020 truck we will confirm fitment with the manufacturer before ordering.
The shipping weight shown here is our own estimate — MetalCloak does not publish a weight for this item. We confirm shipping cost before processing the order.
Frequently asked questions
Does the truck need an alignment afterwards?
Yes. MetalCloak recommends a professional alignment after fitting any of its suspension systems.
Does the kit fit a petrol truck?
No. MetalCloak specifies this system for diesel RAM 2500 trucks.
Are shocks included?
No. This listing is the no-shock version. MetalCloak offers stock shock extensions, RockSport and RockSport BLACK shocks for this kit — we will quote them separately.
Can I order the kit without some parts?
MetalCloak sells it only as a complete system, but every component is available separately — we can place a custom order.
Szekla4x4 is an authorised MetalCloak dealer. We import this part directly from the manufacturer in the USA and confirm lead time when you order. Technical data and fitment are quoted from MetalCloak — if something is not listed here, it is because the manufacturer does not publish it.
