Dieselsite 4WD ESOF Stainless Lines Kit - 1999-2004 Ford F-Series
Dieselsite 4WD ESOF Stainless Lines Kit - 1999-2004 Ford F-Series - Stock to 4.5" Lift is backordered and will ship as soon as it is back in stock.
Shipping & delivery
Usually ships in 2–3 business days unless a different lead time is shown on this page. Shipping cost is calculated at checkout (UPS or USPS to the contiguous U.S.).
Shipping policy · Returns · Fitment questions? (561) 207-7988
Delivery and Shipping
Delivery and Shipping
Standard order processing is 2–3 business days unless this product or your order confirmation states a different lead time. Custom-built, made-to-order, backorder, and pre-order items follow their stated lead times.
Enclosures and subwoofer boxes ship for $50 per unit. Other shipping charges are calculated at checkout. Orders outside the contiguous 48 United States may require additional shipping; we will contact you for approval before shipment.
Subwoofer boxes ship UPS Ground where available. Read our Shipping Policy and Return and Refund Policy for delivery, product-specific return windows, and warranty details.
Dieselsite 4WD ESOF Stainless Lines Kit - 1999-2004 Ford F-Series
Dieselsite 4WD ESOF Stainless Lines Kit - 1999-2004 Ford F-Series - Stock to 4.5" Lift is backordered and will ship as soon as it is back in stock.
Description
Description
Dieselsite ESOF Stainless Steel Vacuum Line Kit
If your ESOF (Electronic Shift On The Fly) 4WD system isn’t engaging properly, the problem is often not electrical — it’s vacuum-related. Over time, the factory rubber vacuum hoses dry rot, crack, or collapse, and the steel fittings at the hubs commonly rust and leak. Any vacuum loss prevents the hubs from locking correctly.
The Dieselsite ESOF Stainless Lines Kit permanently solves this issue by replacing the weak factory hoses and fittings with Teflon-lined stainless steel braided lines built to withstand heat, moisture, and corrosion.
🛠️ Why This Kit Works Better Than OEM:
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Replaces failure-prone rubber vacuum hoses
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Eliminates rusted, leaking factory steel fittings
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Teflon-lined stainless braided construction for long-term durability
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Maintains consistent vacuum for reliable hub engagement
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Designed specifically for ESOF-equipped Super Duty trucks
📏 Lift Height Options:
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Stock – 4.5" Lift
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6" – 8" Lift
(Choose the correct length based on your suspension setup)
📦 What’s Included:
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Driver-side stainless vacuum hose
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Passenger-side stainless vacuum hose
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Teflon tape for installation
🚗 Fitment:
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1999–2003 Ford 7.3L F-250 / F-350 Super Duty
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1999–2004 Ford 5.4L F-250 / F-350 Super Duty
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1999–2004 Ford V10 F-250 / F-350 Super Duty
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2003–2004 Ford 6.0L F-250 / F-350 Super Duty
If your ESOF system is intermittent, slow to engage, or completely inoperative, this stainless line kit is one of the most effective and permanent fixes available. Built to outlast the truck and restore dependable 4WD operation.
Fitment & installation
Fitment & installation
Check the selected part against your vehicle. Need help? Call (561) 207-7988.
Selected part: DS:4WD:4WD
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Read FOX’s application notes for part 987-24-001 (rear shock)
Payment & Security
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