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Huge inventory of 1966-1979 Ford Bronco and other off-road vehicle parts. Great prices and unmatched service from experienced Bronco builders.

Flex-Master Leaf Springs Pair 4inch 9-Pack for 78-79 Bronco and 73-79 F150 4WD
We were after three things when we designed our Flex-Master leaf springs. First, strength is very important so we chose a nine leaf spring ( 1 ) with Berlin eyes ( 2 ) on both ends and we upgraded to a 7/16" center pin ( 3 ). We have found the stock 3/8" pins inadequate for today's wheeling. Slight clearancing on the stock spring wedge is necessary with the new center pins.

Next, we wanted flexibility. This is achieved by the progressive design. We have also added UHMW polyethylene tip inserts ( 4 ) and galvanized liners ( 5 ) to provide separation for less friction and smoother operation.

Lastly, practical spring function is enhanced with a double wrap front eye ( 6 ) for safety. We included a flat mounting surface ( 7 ) which allows for a non-preloaded installation and proper match to axle mounting surface. Strategically located riveted bolt clips ( 8 ) are used to keep springs in line and assist in dampening axle wrap.