Reviewed by Andrew, 4WD Suspension fitment team
Tough Dog raised rear leaf springs for the Mazda BT-50 B2500/B3000 (11/2006 - 10/2011), approximately 45mm of lift, sold as a left-hand plus right-hand pair. Select 0-300kg for mixed use or Constant 300kg for permanent loads.
Add U-bolts, greasable shackles and pins, urethane bush kit or Air Assist bellows airbags from the options below.
Tough Dog leaf springs are a genuinely progressive design: each leaf is set slightly proud of the one above it, so the leaves stay in contact along their whole length instead of slapping together under load.
Two-stage packs carry a lighter primary stage for everyday ride quality, with heavier second-stage leaves that only come into play as the load goes on – that's what stops the rear sagging with a canopy, tools or a camper on the back. Choose the rating by the constant load the vehicle carries, counting only permanent weight.
The matching U-bolts, greasable shackles and pins, and bush kits are available from the option dropdowns on this page – if the originals have been on since new, replace them while the pack is out rather than reusing stretched U-bolts.
Doing the whole vehicle at once? We also stock the matching torsion Bars for the Mazda BT-50 2006-2011.
Pair with Tough Dog rear shocks.
| Make | Model | Series | Years |
|---|---|---|---|
| Mazda | BT-50 | B2500, B3000 | 11/2006 - 10/2011 |
Choose the load rating for the weight the vehicle carries most of the time, counting only permanent fitments such as a bar, winch, canopy or drawers. A heavier rating than you need rides firm when unloaded; a lighter one sags once the gear goes in.
| Part number | Lift | Load rating | Suits / notes |
|---|---|---|---|
| FS368C | 45 mm | 0-300 kg | - |
| FS368L | 45 mm | Constant 300 kg | - |
Leaf springs are replaced as a pair with the axle supported, the U-bolts removed and the spring unbolted from the front hanger and rear shackle. Fit new U-bolts, and replace worn shackle bushes and pins at the same time. Torque U-bolts to spec and re-check them after the first few hundred kilometres. Raised springs need shock absorbers with the correct extended length for the new ride height. In most states a suspension lift of up to 50 mm is allowed without certification under VSB14; larger lifts can require engineering approval, so check the rules for your state.
Last updated: 10 September 2026
Genuine Tough Dog suspension from an authorised Australian dealer.
| Specification | Detail |
|---|---|
| Brand | Tough Dog |
| Type | Rear leaf springs |
| Position | Rear axle |
| Sold as | Pair (both sides) |
| Vehicle | Mazda BT-50 2006-2011 |
| Lift options | 45 mm |
| Load ratings | 0-300 kg, Constant 300 kg |
| Part numbers | FS368C, FS368L |
| Construction | Designed and made in Australia from micro-alloyed spring steel; shot-peened, scragged and load-tested |
| Fitting hardware | New U-bolts recommended; bush and shackle kits available as options |
Load ratings refer to permanent extra weight over the axle. Springs do not change the vehicle's GVM or towing capacity.
0-300kg (FS368C) suits daily driving with variable loads. CONSTANT 300kg (FS368L) is for weight that never leaves the ute - canopy, drawers, service body. Constant-load springs ride firm when empty.
Yes - Tough Dog makes a specific left-hand and right-hand spring pack for this model. This listing supplies one of each.
These suit the following applications: Mazda BT-50 B2500, B3000 11/2006 - 10/2011. Check your build date and variant against the fitment table on this page – if you're not certain, contact us with your rego or VIN details and we'll confirm fitment before you order.
The listed price covers both sides – always replace left and right together so the axle is evenly damped and sprung. It's a bolt-in job for a competent home mechanic or any workshop; check bushes, mounts and brake-line slack while everything is apart.
The options on this listing are: 45 mm. Lift is measured at ride height with the vehicle's normal load. Raised springs need matching shock absorbers with the correct extended length.
Yes. The price covers both Tough Dog springs, one for each side.
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