Heavy Duty Steering Bars & SUMOBARS
Heavy duty steering bars, track rods and drag links for Defender, Discovery 1, Discovery 2 and Range Rover Classic models, including SUMOBARS kits, Terrafirma steering bar kits, Delphi and Lemforder track rod ends, and replacement polyurethane boots.
Start with the vehicle, then match the track rod, drag link, drop arm or steering bar kit to the original steering layout. Check left-hand or right-hand thread, vehicle model, steering box type and any early or late fitment notes on the product page before ordering.
Showing all 15 resultsSorted by popularity
Sold out
TF251 | Early Discovery 1 / Range Rover Classic Heavy Duty Steering Rod Kit – Terrafirma
Find the right heavy duty steering bars
Heavy duty steering parts are normally bought by vehicle and steering layout first. Track rods, drag links, drop arms and track rod ends are not universal across Defender, Discovery 1, Discovery 2 and Range Rover Classic, so use the product title, vehicle fitment and thread direction together before adding parts to the basket.
| Job | Best place to start | Check before ordering |
|---|---|---|
| Defender steering bar upgrade | Defender heavy duty steering bar kits and matching track rod ends | Check Defender model, right-hand drive fitment, steering box type and original drop arm layout |
| Defender drop arm conversion | SUMOBARS drop arm conversion kit and matching Delphi track rod ends | Check power steering box type; conversion kits are layout-specific and must not be treated as universal Defender parts |
| Discovery 2 steering bar upgrade | Discovery 2 SUMOBARS or Terrafirma track rod and drag link kits | Check that the kit matches Discovery 2 fitment and includes the required steering damper mounting parts where needed |
| Discovery 1 or Range Rover Classic steering bars | Terrafirma heavy duty steering rod kits for Discovery 1 and Range Rover Classic | Check early or late vehicle setup where the product title or fitment notes state a split |
| Track rod end replacement | LH and RH thread track rod ends from Delphi, Lemforder or greaseable replacement ranges | Match left-hand or right-hand thread and check the part number against the original end before ordering |
Check steering bar fitment before ordering
Heavy duty steering bars can look similar in photos but differ by vehicle, bar position, thread direction, steering box type and steering damper mounting. A track rod joins the front wheels together, while a drag link connects the steering box side of the system to the opposite side. Match the part to the vehicle and original layout rather than relying on the words “heavy duty” alone.
Vehicle model
Use the product title and fitment notes to separate Defender, Discovery 1, Discovery 2 and Range Rover Classic steering parts.
Use the product title and fitment notes to separate Defender, Discovery 1, Discovery 2 and Range Rover Classic steering parts.
Track rod or drag link
Check whether the part replaces the rear track rod, front drag link, complete steering bar kit or drop arm conversion parts.
Check whether the part replaces the rear track rod, front drag link, complete steering bar kit or drop arm conversion parts.
Thread direction
Track rod ends split by left-hand and right-hand thread; match the thread before ordering replacement ends.
Track rod ends split by left-hand and right-hand thread; match the thread before ordering replacement ends.
Steering box and drop arm
Defender drop arm conversion parts depend on the steering box and original drop arm setup, especially on RHD vehicles.
Defender drop arm conversion parts depend on the steering box and original drop arm setup, especially on RHD vehicles.
SUMOBARS, Terrafirma and replacement track rod ends
Individual product pages identify the brand, vehicle fitment, included parts and quality level where that information is available. SUMOBARS kits sit at the stronger end of the steering bar range, while Terrafirma kits cover supported heavy duty steering bar fitments. Replacement track rod ends and polyurethane boots are listed separately where the steering bars or ball joints can be maintained without replacing the complete kit.
| Part type | How it is shown on Twinwoods 4x4 |
|---|---|
| SUMOBARS steering kits | Listed by vehicle and kit type, with product pages showing bar material, included track rod ends and kit contents where stated. |
| Terrafirma heavy duty kits | Listed by Terrafirma reference and vehicle fitment, including Defender, Discovery 1, Discovery 2 and Range Rover Classic steering bar kits where supported. |
| Replacement track rod ends | Listed by thread direction, brand and part number, including Delphi, Lemforder and greaseable replacement ends where available. |
| Boots and small service parts | Used for maintaining compatible track rod ends, drop arm ball joints and steering bar assemblies where the product notes confirm fitment. |
Related steering sections
| Section | Use it for |
|---|---|
| Defender Steering Parts | Defender steering boxes, PAS parts, track rod ends, dampers, drop arms and related steering components. |
| Discovery 2 Steering Parts | Discovery 2 steering bars, dampers, PAS parts, ACE and steering fluid, and related steering components. |
| Discovery 1 Steering Parts | Discovery 1 steering parts, track rod ends, steering bars and related front steering components. |
| Range Rover Classic Steering Parts | Range Rover Classic steering parts, track rod ends, drop arm parts and related steering components. |
