Hellwig 3500 lb overload springs - $450 (Visalia)

LP-35 HEAVY DUTY LOAD LEVELER HELPER SPRINGS FOR 1997-2022 FORD E40/E450 WITH 5 LEAF STACK Part Number: 9640 SPECIAL DESIGN HELPER SPRING KIT The Hellwig LP-35 Helper Spring set the standard for all other aftermarket helper springs.
Featuring a Fulltime Spring Rate design it is the workhorse of the Hellwig Spring line.
This is ideal for fleet applications or vehicles that consistently carry a heavy load day in and day out.