Quote:
Originally Posted by 878ranger878
on my 2003 fx4. it says SPR- 1K. if yours says "1K" you have the best there is for bars and K leaves.
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1 is the highest rated bar.
C is the highest rated leaf.
K leaves are the lowest grade on a torsion bar truck....but there's only 2 grades of leaves on torsion bar trucks too. lol.