it is larger in diameter that the stock piece (which is 32mm maybe?) so it offers more resistance to body roll which keeps the car flatter while cornering.....faster through the turn.
Chris
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1999 Formula 6spd (The driver)
1997 2500 Ext. Cab Dodge 4x4 CTD 5spd (The Earth Mover)
1970 Nova 5spd (The toy)
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