3x5, 3x6 VW Semi-Trailing arms. . .width x length or length x width???

atomicjoe23

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Regarding VW style Semi-Trailing arms. . .when they say 3x5, 3x6, etc. which dimension refers to the width and which dimension refers to length?

I.e. are the arms 3" wider per side and 5" (or 6") longer or are they 3" longer and 5" (or 6") wider per side?

Thanks!
 
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