BossBoss
Boss leaf helper air bag kit (Load Assist)
Boss Load Assist kits fit Boss Extreme Series airbags and 6 mm thick brackets between the chassis and the rear leaf spring axle, so you can add air to level the vehicle when loaded or towing.
From RRP $745 + fitment (excl. freight)
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- Fitted in our Miami workshop. We only fit parts we supply.
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About the leaf helper air bag kit (Load Assist)
Boss Load Assist kits fit Boss Extreme Series airbags and 6 mm thick brackets between the chassis and the rear leaf spring axle, so you can add air to level the vehicle when loaded or towing.
Kits are vehicle specific, with separate kits for standard height and lifted vehicles..
Features
- Boss Extreme Series double or triple bellow airbags
- Rated 2500 lb (1136 kg) per side on most kits, 2600 lb on 2600 series kits
- Government approved tested to over 750 PSI
- Mostly bolt on using hand tools
- Separate kits for up to 2 inch and greater than 2 inch lift
- Boss in cab control and on board air kits can be added
Want it fitted? Tell us your ute and we text you a fitted price within one business day.
Get your fitted priceCall (07) 5572 1711Specifications
| Airbag rating | 2500 lb / 1136 kg per side (2600 lb / 1186 kg on 2600 series kits) |
|---|---|
| Test pressure | Government approved tested to over 750 PSI |
| Typical operating pressure | Around 15 to 45 PSI for an average dual cab ute depending on load |
| Minimum pressure | Boss recommends 5 to 10 PSI unladen |
| Fitting position | Rear, between chassis and axle |
| Effect on GVM | Boss states a Load Assist kit does not increase GVM |
| Part numbers | 85 vehicle specific kits (see variants) |
| RRP | $745 to $910 |
| RRP note | 1 listing(s) show no price (price on application) |
| What's in the box | 2 x Boss Extreme Series airbags (double or triple bellow to suit the kit), 4 x brackets (2 upper and 2 lower), Mounting hardware, SAE J844 government approved airline, Dual Schrader valves mounted in a stainless panel, Fitting instructions |
| Brand | Boss |
| Warranty | 5 year waranty on and off road |
| Price | From RRP $745 + fitment (excl. freight) to $910 |
Downloads
- Boss fitting instructions LA-98PDF from Boss
- Boss fitting instructions LA-135-ZRPDF from Boss
- Boss fitting instructions LA-107PDF from Boss
- Boss fitting instructions LA-T91PDF from Boss
- Boss fitting instructions LA-T80PDF from Boss
- Boss fitting instructions LA-T65PDF from Boss
- Boss fitting instructions LA-T44PDF from Boss
- Boss fitting instructions LA-T43PDF from Boss
- Boss fitting instructions LA-T41PDF from Boss
- Boss fitting instructions LA-T36PDF from Boss
- Boss fitting instructions LA-T31PDF from Boss
- Boss fitting instructions LA-T28PDF from Boss
- Boss fitting instructions LA-T26PDF from Boss
- Boss fitting instructions LA-T25PDF from Boss
- Boss fitting instructions LA-T22PDF from Boss
- Boss fitting instructions LA-T21PDF from Boss
- Boss fitting instructions LA-T18PDF from Boss
- Boss fitting instructions LA-T17PDF from Boss
- Boss fitting instructions LA-T14PDF from Boss
- Boss fitting instructions LA-T13 ( Leaf Spring Models Only )PDF from Boss
- Boss fitting instructions LA-T120PDF from Boss
- Boss fitting instructions LA-T116PDF from Boss
- Boss fitting instructions LA-T101PDF from Boss
- Boss fitting instructions LA-T100 (Doubles + spacers)PDF from Boss
- Boss fitting instructions LA-T09PDF from Boss
- Boss fitting instructions LA-T07PDF from Boss
- Boss fitting instructions LA-T05PDF from Boss
- Boss fitting instructions LA-T04PDF from Boss
- Boss fitting instructions LA-T03PDF from Boss
- Boss fitting instructions LA-T01PDF from Boss
- Boss fitting instructions LA-129PDF from Boss
- Boss fitting instructions LA-79PDF from Boss
- Boss fitting instructions LA-48PDF from Boss
- Boss fitting instructions LA-46PDF from Boss
- Boss fitting instructions LA-92PDF from Boss
- Boss fitting instructions LA-60PDF from Boss
- Boss fitting instructions LA-59PDF from Boss
- Boss fitting instructions LA-52PDF from Boss
- Boss fitting instructions LA-47PDF from Boss
- Boss fitting instructions LA-42PDF from Boss
Fitted in Miami
We fit air suspension at our Miami workshop, run the air lines clear of heat and moving parts, and set the pressures for how you load the vehicle.
Vehicles it suits
85 fitments listed. Prices are RRP plus fitment, excluding freight.
| Vehicle | Part number | RRP | Quote |
|---|---|---|---|
| Chev GMC Silverado 1500 2007 to 2019 | LA-42 | $830 | Get price |
| Chev GMC Silverado 1500 2020 on (3-4" Lifts) | LA-T135 | $890 | Get price |
| Chev GMC Silverado 1500 2020 on (STD Height only) | LA-135 | $830 | Get price |
| Chev GMC Silverado 1500 2020 on (Std Height ZR Models) | LA-135-ZR | $830 | Get price |
| Chev GMC Silverado 1500 2020 on (With 2"-3" lifts) | LA-135-Lift | $830 | Get price |
| Chev GMC Silverado 2500 3500 2010plus (2.5" - 4" inch lift) | LA-T43 | $890 | Get price |
| Chev GMC Silverado 2500 3500 2010plus (up to 2.5 inch lift) | LA-43 | $830 | Get price |
| Chev Silverado 07-10 2500 | LA-46 | $830 | Get price |
| Chev Silverado 1500-2500HD 01-09 (greater than 2 inch lift) | LA-T31 | $890 | Get price |
| Chev Silverado 1500-2500HD 01-09 (up to 2 inch lift) | LA-31 | $830 | Get price |
| Chev Silverado 2500-3500 88-99 | LA-48 | $830 | Get price |
| F250 F350 2017 on 1-3 lift + Triples | LA-T120-MID | $910 | Get price |
| F250/350 2017 on 1-3 lifted | LA-120 MID LIFT | $890 | Get price |
| F250/350 2017 on 3-4 lifted | LA-120 HIGH LIFT | $890 | Get price |
| Ford F150 04-16 6 inch LIFT | LA-79 | $890 | Get price |
| Ford F150 2004 on (greater than 3 inch lift) | LA-T36 | $890 | Get price |
| Ford F150 2004 on (up to 3 inch lift) | LA-36 | $830 | Get price |
| Ford F150 Raptor - up to mid 2022 | LA-92 | $830 | Get price |
| Ford F250 F350 1999-2009 (greater than 2 inch lift) | LA-T05 | $805 | Get price |
| Ford F250 F350 1999-2009 (up to 2 inch lift) | LA-05 | $745 | Get price |
| Ford F250 F350 2010-2016 (greater than 2 inch lift) | LA-T44 | $805 | Get price |
| Ford F250 F350 2010-2016 (up to 2 inch lift) | LA-44 | $745 | Get price |
| Ford F250 F350 2017 on (greater than 2 inch lift) | LA-T120 | $890 | Get price |
| Ford F250 F350 2017 on (up to 2 inch lift) | LA-120 | $830 | Get price |
| Ford Ranger 22+/ VW Amarok 23+ (Next Gens) (greater than 2 inch lift) | LA-T80 | $805 | Get price |
| Ford Ranger 22+/ VW Amarok 23+ (Next Gens) (up to 2 inch lift) | LA-80 | $745 | Get price |
| Ford Ranger PHEV (Nxt Gen) 22+ | LA-20 | $745 | Get price |
| Ford Ranger PX / Mazda BT50 Lowrider 2011 on | LA-60 | $745 | Get price |
| Ford Ranger Super Duty-Dec 2025 on | LA-98 | $830 | Get price |
| Great Wall Cannon or Alpha 2021 onwards | LA-52 | $745 | Get price |
| GWM Cannon 2021-25 or Alpha above a 2" Lift | LA-86 | $745 | Get price |
| Holden Colorado 12 + / LDV T60 & Steed 2/4WD (greater than 2 inch lift) | LA-T13 ( Leaf Spring Models Only ) | $805 | Get price |
| Holden Colorado 12 + / LDV T60 & Steed 2/4WD (up to 2 inch lift) | LA-13 ( Leaf Spring Models Only ) | $745 | Get price |
| Holden Colorado Rodeo Pre 2012 | LA-09 Rodeo | $745 | Get price |
| Isuzu DMAX Pre 2012 (greater than 2 inch lift) | LA-T21 | $805 | Get price |
| Isuzu Dmax Pre 2012 (up to 2 inch lift) | LA-21 | $745 | Get price |
| Isuzu Dmax RG 10/20 + / Mazda BT50 TF 10/20+ (1-2.5" lift) | LA-47 | $745 | Get price |
| Isuzu Dmax RG 10/20 + / Mazda BT50 TF 10/20+ (2.5" - 4" inch lift) | LA-T41 | $805 | Get price |
| Isuzu Dmax RG 10/20 + / Mazda BT50 TF 10/20+ (Standard height) | LA-41 | $745 | Get price |
| Isuzu Dmax RT 2012-2020 (greater than 2 inch lift) | LA-T22 | $805 | Get price |
| Isuzu Dmax RT 2012-2020 (up to 2 inch lift) | LA-22 | $745 | Get price |
| MAZDA BT50 / FORD RANGER Jun 2012 | CL-LA-28 | On request | Get price |
| Mazda BT50 2012-09/20 Ford Ranger 2012-7/22 (greater than 2 inch lift) | LA-T28 | $805 | Get price |
| Mazda BT50 2012-09/20 Ford Ranger 2012-7/22 (up to 2 inch lift) | LA-28 | $745 | Get price |
| Mitsubishi Triton 2WD Pre 2005 | LA-59 | $745 | Get price |
| Mitsubishi Triton 4WD 2016 - 2024 MQ&MR (greater than 2 inch lift) | LA-T26 | $805 | Get price |
| Mitsubishi Triton 4WD 2016-2024 MQ&MR (up to 2 inch lift) | LA-26 | $745 | Get price |
| Mitsubishi Triton 4WD Pre 2005 (greater than 2 inch lift) | LA-T18 | $805 | Get price |
| Mitsubishi Triton 4WD Pre 2005 (up to 2 inch lift) | LA-18 | $745 | Get price |
| Mitsubishi Triton ML MN 05-15 (greater than 2 inch lift) | LA-T17 | $805 | Get price |
| Mitsubishi Triton ML MN 05-15 (up to 2 inch lift) | LA-17 | $745 | Get price |
| Mitsubishi Triton MV Mar 2024 on & Nissan Navara D27 Mar 2026 on (greater than 2 inch lift) | LA-T91 | $805 | Get price |
| Mitsubishi Triton MV Mar 2024 on & Nissan Navara D27 Mar 2026 on (up to 2 inch lift) | LA-91 | $745 | Get price |
| Nissan Navara 2WD D21 D22 | LA-09 Navara | $745 | Get price |
| Nissan Navara 4WD D22 Leaf Spring (greater than 2 inch lift) | LA-T07 | $805 | Get price |
| Nissan Navara 4WD D22 Leaf Spring (up to 2 inch lift) | LA-07 | $745 | Get price |
| Nissan Navara D40 4WD (greater than 2 inch lift) | LA-T14 | $805 | Get price |
| Nissan Navara D40 4WD (up to 2 inch lift) | LA-14 Navara | $745 | Get price |
| Nissan Navara NP300 4WD Leaf Sprung (greater than 2 inch lift) | LA-T116 | $805 | Get price |
| Nissan Navara NP300 4WD Leaf Sprung (up to 2 inch lift) | LA-116 | $745 | Get price |
| Nissan Patrol 4WD Leaf Spring excluding H260 Diff (greater than 2 inch lift) | LA-T02 | $805 | Get price |
| Nissan Patrol 4WD Leaf Spring excluding H260 Diff (up to 2 inch lift) | LA-02 | $745 | Get price |
| Nissan Patrol 4WD Leaf Spring H260 DIFF (greater than 2 inch lift) | LA-T129 | $805 | Get price |
| Nissan Patrol 4WD Leaf Spring H260 DIFF (up to 2 inch lift) | LA-129 | $745 | Get price |
| RAM 3500 Cab Chassis | LA-107 | $830 | Get price |
| Toyota Hilux 2WD | LA-09 Hilux 2WD | $745 | Get price |
| Toyota Hilux 2WD Workmate 2016 on | LA-09 Hilux Workmate | $745 | Get price |
| Toyota Hilux 4WD 05-15 (up to 2 inch lift) | LA-03 | $745 | Get price |
| Toyota Hilux 4WD 05-16 (greater than 2 inch lift) | LA-T03 | $805 | Get price |
| Toyota Hilux 4WD 2015 on (Up to 2" Lift) | LA-101 | $745 | Get price |
| Toyota Hilux 4WD 2015vPlus (greater than 2 inch lift) | LA-T101 | $805 | Get price |
| Toyota Hilux 4WD pre 2005 (greater than 2 inch lift) | LA-T04 | $805 | Get price |
| Toyota Hilux 4WD pre 2005 (up to 2 inch lift) | LA-04 | $745 | Get price |
| Toyota Landcruiser - Leaf Spring Rear (3 inch lift) | LA-T09 | $805 | Get price |
| Toyota Landcruiser - Leaf Spring Rear (4 inch lift) | LA-T01 | $805 | Get price |
| Toyota Landcruiser - Leaf Spring Rear (standard height) | LA-09 Landcruiser | $745 | Get price |
| Toyota Landcruiser 80/100 Series (Double + Spacers) (greater than 2 inch lift) | LA-T100 (Doubles + spacers) | $855 | Get price |
| Toyota Landcruiser FJ40 | LA-09 FJ40 | $745 | Get price |
| Toyota LandCruiser Rear Leaf Spring (Up to 2" Lift) | LA-01 | $745 | Get price |
| Toyota Tundra 2008-2023 (greater than 2 inch lift) | LA-T39 | $890 | Get price |
| Toyota Tundra 2008-2023 (up to 2 inch lift) | LA-39 | $830 | Get price |
| Toyota Tundra 2023 on (greater than 2 inch lift) | LA-T65 | $805 | Get price |
| Toyota Tundra 2023 on (up to 2 inch lift) | LA-65 | $745 | Get price |
| VW Amarok 2010-2022 (any lift) | LA-T25 | $805 | Get price |
| VW Amarok 2010-2022 (standard height) | LA-25 | $745 | Get price |
Video
Want it fitted? Tell us your ute and we text you a fitted price within one business day.
Get your fitted priceCall (07) 5572 1711Prices are the supplier's recommended retail price for the part, plus fitment by our technicians, excluding freight. Freight is charged where stock is shipped to us for your job. Every part is fitted in our Miami workshop and covered by the maker's warranty plus our workmanship guarantee. Prices checked 21 October 2026.
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