Pay in 4 interest-free payments of $30.00 Learn more
Ships within 48 hours · Estimated delivery Aug 22 - Aug 27
and ships with the cartridge plus the required seal package
Slow brake release — chambers stay applied after pedal release
AS-0048-2G
and load rating against your existing air spring before ordering — multiple Firestone rolling-lobe springs share similar dimensions but differ in plate stud configuration
Verify your Allison transmission model and serial number before ordering to confirm fitment
World American WA01-9978C Air Spring | Replaces Mack 8446-S28929 Filtration and ships with the cartridgeThe World American WA01 9978C is a heavy duty rolling lobe air spring engineered for trailer suspensions. Designed as a direct replacement for Mack 8446 S28929, this OEM equivalent spring delivers consistent height control, superior durability, and reliable damping for long haul and vocational trailers. Built to withstand harsh road conditions and heavy loads on highways and back roads. Specifications Category Air Springs Air Bags Part Type Trailer
![Bucket Snack mascot [3.Bird x squirrel]](https://cdn.shopify.com/s/files/1/0411/1102/7877/products/g-4qjo000veb-003.jpg?v=1666916757)
US$ 199.50
US$ 120.00
![Shellfish with lid Punyupunyu mascot Part.4 [2.Hotate]](https://cdn.shopify.com/s/files/1/0411/1102/7877/products/g-4qjo000vff-002.jpg?v=1666916699)
![Bourbon miniature candy mascot [Normal 5 type set(Secret are NOT including)]](https://cdn.shopify.com/s/files/1/0411/1102/7877/products/g-4qjo000vib-008.jpg?v=1666917006)
![Senbei mascot Part.2 [4.Shelf and Nori Senbei]](https://cdn.shopify.com/s/files/1/0411/1102/7877/products/g-4qjo000vei-004.jpg?v=1666916788)
![Shoulder Zun Fig. Beauty and the Beast [1.Gaston]](https://cdn.shopify.com/s/files/1/0411/1102/7877/products/g-4qjo000vic-001.jpg?v=1666917050)
US$ 287.50
US$ 817.50
![Haikyu!! Nitotan Figure Mascot Spiker Edition [All 5 type set(Full Complete)]](https://cdn.shopify.com/s/files/1/0411/1102/7877/products/g-4qjo000vih-006.jpg?v=1666917097)
![Decora PIC Acrylic Golden Kamuy [9.Second Lieutenant Koito]](https://cdn.shopify.com/s/files/1/0411/1102/7877/products/g-4qjo000vfy-009.jpg?v=1666916888)
![1/2000 scale Navy Kit of the World vol.4 [5.(5-A) Japanese cruiser Aoba (Full-hull Ver.)]](https://cdn.shopify.com/s/files/1/0411/1102/7877/products/bs-4qjp000vkl-005.jpg?v=1667003500)
![Chainsaw Man Pyonkore Figure [4.Makima]](https://cdn.shopify.com/s/files/1/0411/1102/7877/products/g-4qjo000vij-004.jpg?v=1666917020)
US$ 284.00
