
Kimpex HD4
$12,749
Heavy duty · kit price for this machine
- Published Defender applications
- 57
- Model years
- 2016–2025
Fits Defender HD10, Defender HD9, Defender HD7 and 4 more.
Camso & Kimpex · Authorized dealer
The Defender is the best-covered side-by-side in our catalog after the Ranger, and the reason is that Can-Am has kept the chassis close enough across HD5 through HD11 for the manufacturers to publish kits for nearly all of it. What changes between them is not the engine — it is the shape of the front A-arms, the wheel bolt pattern and the model year, and those are what decide which kit you can order.

Verified fitment
Read down to your trim, then across to see which systems we can actually supply a kit for. 137 applications across 8 trims, taken from our own catalog rather than from engine size — a machine is on this table because a kit is published for it, not because it looks like one that is.
Watch the A-arm column. Camso publishes two different 4S1 kits for the Defender — one for straight front A-arms and one for arched — and both appear against the HD8, HD9 and HD10. Displacement will not tell you which one you have, and neither will the trim name on its own.
Scroll the table sideways to see every system.
Not on this table: Camso ENDUR
That system is sold for side-by-sides, but it publishes no application for a Can-Am Defender in our catalog. That is not the same as saying it will not fit — it means nobody has published a mounting kit for this machine, and we are not going to sell you one on a guess. Call us if you have seen one fitted and we will look into it.
Pick a system, then your year. These are the 4 systems with published Can-Am Defender fitment — the finder searches all of Can-Am, so confirm the result names your trim.

HD4
$12,749

WSS4
$5,995

X4S
$5,049

4S1
$6,599
The shortlist
Coverage first, price second. The counts below are this machine's own published applications, not the system's catalog-wide total, so a system that fits one trim of yours cannot look like one that fits all of them.

$12,749
Heavy duty · kit price for this machine
Fits Defender HD10, Defender HD9, Defender HD7 and 4 more.

$5,995
All-around · kit price for this machine
Fits Defender HD10, Defender HD9, Defender HD7 and 4 more.

$6,599
All-around · kit price for this machine
Fits Defender HD10, Defender HD9, Defender HD7 and 3 more.

$5,049
All-around · kit price for this machine
Fits Defender HD7 and Defender HD5.
Quoted from Camso and Kimpex, not converted or re-measured. The two companies do not measure ground coverage the same way and neither says how, so read those figures against each other with care.
| Specification | Kimpex HD4 | Kimpex WSS4 | Camso 4S1 | Camso X4S |
|---|---|---|---|---|
| Manufacturer rating | UTV, with a published load capacity rather than a displacement range | UTV only, four seasons | Side-by-side, 400 to 1000cc | ATV 300 to 1000cc, side-by-side 400 to 700cc |
| Ground coverage | 1.78 m² (2,761 sq in) flotation surface | 1.57 m² (2,430 sq in) flotation surface | approx. 2,520 sq in ground coverage | approx. 2,000 sq in ground coverage |
| Lug height | 28.6 mm (1.125 in) | 25 mm (1 in) front / 33 mm (1.3 in) rear | 1.125 in front and rear | 1.125 in front / 1.25 in rear |
| Published load rating | 4,000 lb load capacity | Not published | Not published | Not published |
| Speed loss vs tires | 30% | 35% | Camso states an average 30% speed loss across its track systems, and the 4S1 manual sets a 40 km/h (about 25 mph) maximum real speed | Average about 30%, and up to 50% on some vehicles |
| Frame | Aluminum A206, one-piece cast frame | Triangulated steel, 2.5 in (64 mm) tubing | Carbon steel | Carbon steel |
| Warranty | Kimpex publishes two different figures — 3 years on the Commander microsite, 1 year plus 1 more on registration on the US warranty page | 1 year, plus 1 additional year on registering the product | 2-year limited, valid when the system is installed by an authorized Camso dealer | 2-year limited, valid when the system is installed by an authorized Camso dealer |
Sources, read 30 August 2026: Kimpex HD4 · Kimpex WSS4 · Camso 4S1 · Camso X4S.
What actually differs
The track units are the same product on every machine they fit. What is specific to yours is the hardware that attaches them and the gearing that drives them — which is why fitment is published per trim and per year rather than per engine size.

Camso lists the Defender HD10 DPS/XT/XT-P (2020–2026) and the Defender HD10 MAX DPS/XT (2020–2026) against the same 4S1 part number, 6522-02-1326. The same is true a generation earlier: the straight-A-arm HD10 and HD10 MAX from 2017–2019 both take 6522-02-1219. Six seats and three seats, one kit. Kimpex works the other way — each Commander HD4 listing carries its own vehicle adapter in the part number, so a MAX and a standard are separate orders even when the track units are identical.
Camso rates the X4S for side-by-sides from 400 to 700cc and the 4S1 from 400 to 1000cc. That single line explains the shape of the Defender table: the X4S appears against the HD5 and the HD7 and nowhere else in the family. It is not a cheaper way to do an HD10 — Camso does not publish it for one, and the 700cc ceiling is the manufacturer’s own.

Four track units, identical on every machine they fit, plus vehicle-specific hardware. On the Camso side that hardware is the mount kit and the sprocket: Camso lists 16-tooth sprockets for the HD5, 17 for the HD7 and 18 for the HD8, HD9, HD10 and HD11. On the Kimpex side it is the A-arm adapter and the front and rear anti-rotation kits, ordered as separate line items alongside the track kit.
In use
The reason most Defenders end up on tracks. Kimpex publishes a 4,000 lb load capacity for the HD4 and qualifies it — check the figure against your machine’s weight with whatever you have hung off it.
The MAX body is well covered: both manufacturers publish six-seat applications across the HD7, HD9 and HD10, and on the Camso side often as the same part number as the three-seat.
Kimpex lists the WSS4 for marshland, mud, sand, dirt road and gravel as well as snow. What you trade is speed — Kimpex publishes 30% loss on the HD4 and 35% on the WSS4.
Watch
Kimpex COMMANDER HD4 — the heavy-duty UTV track system
Built for remote locations
Ownership
What ships, what the install involves, and what you will be buying again in a few seasons.
A Camso kit is four units plus the vehicle-adapted mount kit, on one line. A Kimpex Commander install is three orders: the track kit, the track adapter for your machine, and the front and rear anti-rotation kits. The Kimpex track kit on its own will not mount to a Defender.
Kimpex sells the HD4 as a 4-hole kit (493000) and a 5-hole kit (493200), and the WSS4 as 393001 for 4/110, 4/115 and 4/137 patterns and 393201 for 4/156, at the same price. The hub bolt pattern on your Defender decides which one you order — it is not a preference.
Kimpex publishes 1.5 hours for a first WSS4 fit and 30 minutes for subsequent swaps once the vehicle-side hardware is on. Camso’s two-year limited warranty is stated as valid when the system is installed by an authorized dealer. Kimpex publishes two different warranty terms for Commander kits — three years on its Commander microsite, one year plus one more on registration on its US warranty page — so ask us to confirm which applies before you rely on either.
Camso publishes an average 30% speed loss across its systems, up to 50% on some vehicles, and sets a 40 km/h real-speed maximum in the 4S1 manual — about 25 mph, which reads nearer 70 km/h on the vehicle speedometer. Kimpex publishes 30% for the HD4 and 35% for the WSS4.
Bearings, hubs, sprockets, tread and tensioners, searchable by the serial number on your unit.
Open parts & service→Transfer kits adapt a set you already own to a different chassis. Which parts you need depends on both machines, so check the pairing before you sell the Defender.
Open transfer kits→Have your year, trim and VIN ready — on a Defender the trim and the model year are what decide the kit, not the engine size.
Ask us about your machine→Questions
By trim and model year, not by engine. Camso publishes two Defender 4S1 kits: 6522-02-1219 for straight front A-arms and 6522-02-1326 for arched. Broadly, the straight kit covers the 2016–2021 HD8, the non-CAB 2022–2026 HD9 and the 2016–2019 HD10; the arched kit covers the CAB, Limited and Lone Star bodies from 2018 and the whole 2020-onward HD10. “Broadly” is doing real work in that sentence — the split follows neither displacement nor model year cleanly, and the X mr takes its own parts again on top. This is the most common ordering mistake on a Defender, and it is worth thirty seconds on the phone.
Not from published fitment. The ENDUR has four published applications in the whole catalog — the Polaris Ranger XP, the Ranger XD 1500, the Polaris Xpedition XP/ADV and the CFMOTO UForce U10 PRO — and no Can-Am among them. Camso describes the ENDUR as built for side-by-sides over 1000cc and says it comes with mount kits for recent Polaris and CFMOTO machines. If someone has told you otherwise, tell us who and we will chase it.
Because Camso rates it that way. The X4S is published for side-by-sides from 400 to 700cc; the 4S1 goes to 1000cc. The HD5 is 500cc and the HD7 is 700cc, so they sit inside the X4S range and the HD8 upward do not. On a larger Defender the 4S1 is the Camso system, not a bigger X4S.
Sometimes the whole kit does. A straight-A-arm HD8 (2016–2021) and a straight-A-arm HD10 (2016–2019) are listed against the same Camso 4S1 part number, and both take 18-tooth sprockets — so for those two machines it is the same kit, not a modified one. A 2020-or-later HD10 has arched A-arms and takes a different part number, and Kimpex kits are adapter-specific in every case. Check the pairing against both machines before the old one is sold; our transfer kit pages cover what changes when it is not a straight swap.
One, so far. Our catalog publishes a single 2026 Defender HD11 application, for the Camso 4S1, and Camso’s August 2026 application guide lists both the HD11 and the HD11 MAX against part 6522-02-0988 with 18-tooth sprockets. Neither Kimpex system publishes an HD11 application yet. The HD11 is new — Can-Am introduced it for the 2026 model year — so expect this row to grow.
Have your model year and trim to hand — on this machine those two are what decide the kit. We will tell you what is published for it and what is not.