- Air Brake Parts
- ABS Cables
- Dryers and Cartridges
- Gladhands
- Other Air Brake Parts
- Sensor Kits
- Switches
- Valves
- Air Filters
- Air Springs
- Cabin Air Springs
- Convoluted Air Springs
- Reversible Sleeve Air Springs
- Brake Chambers
- Wheel Seals
- Reefer Parts
- Shock Absorbers
- Slack Adjusters
- Truck Accessories
- Other Truck Accessories
- Tail Lights and Markers
- Wheel Axle Covers
- Truck Body Parts
- Bumpers
- Fenders
- Fog Lights
- Grilles
- Headlights
- Mirrors and Covers
- Mud Flap Hangers
- Other Truck Body Parts
- Other
- Hub Caps
- Pick-up Truck Parts
- Air Helper Kit Brackets
- Air Helper Kits for Pick-up(s)
- Other Pick-up Truck Parts
- Pick Up Convoluted Air Spring
- Silicone Hoses
- Wheel Bearings
HIGH QUALITY
FAST SHIPPING
LOW
PRICES
BSWParts 4 PCS Air Spring Bag Replacement for Firestone W01-358-9978, Hendrickson S-28929
PREMIUM BUILD - Part number is permanently engraved for easy identification. Features 4.5-5.0 mm thick rubber that surpasses OEM standards, 25% stronger 4140-grade steel studs, reinforced composite pistons, and industry-leading leak test performance after final assembly.
REPLACEMENT FOR - Hendrickson C-28929, S-28929 // Firestone W01-358-9978 // Triangle AS-8959 // AS9978, HDV9978, HD9978 // Sampa SP559978-KP
SPECS - Extended Height: 18.00" // Compressed Height: 7.90" // Top Plate Width: 9.00" // Piston Width: 10.16" // Weight: 15.10 lbs
FITMENT - Contact your dealer to confirm the correct part number, then verify if this air bag is a suitable replacement. You can also compare the specs with the diagram provided. Important: Purchasing an air bag solely by make and model is a common mistake—always double-check compatibility before buying.
Warning:This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov/.
CATEGORIES AIR HELPER KIT(S) FOR PICK-UP REVERSIBLE AIR SPRINGS BUMPERS BRAKE CHAMBERS AIR FILTERS OTHER TRUCK BODY PARTS SLACK ADJUSTER HEADLIGHT ALL CATEGORIES Shipping - All orders are processed within 2 business day of receipt of payment.
- The tracking number will be sent to you via e-mail when items are shipped.
- Local pick up is available. Please email for arrangements.
- Only ship to the confirmed address provided by PayPal. Please make sure your address in PayPal matches the address you would like us to ship to.
- Address changing must be confirmed by our customer service before payment.
- We DO NOT ship to Hawaii, Alaska, APO, FPO, and Puerto Rico.
- Shipping fees and return fees are not refundable.
Payment - We accept PayPal and only ship to a confirmed address.
- We accept E-Check through PayPal, will ship after check clears (usually 7–10 days).
- Items will ship out once the payment is made.
- Checkout is expected within 3 days of sale close and payment within 4 days.
- Unpaid sale wins will be forfeited after 4 days.
Returns - Buyer will be charged 10% restocking fee after 30 day of the purchase for any unused returned item.
- All items must be returned with all original contents and components with prior authorization.
- Return shipping shall be the responsibility of the buyer. We pay the shipping to send replacement.
- Inspect package before accepting shipment. Save packaging for claims.
Refund Shipping fees and return fees are not refundable. Approved refunds are processed back to the original form of payment in accordance with marketplace and payment processor policies.
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