Do you have a new front axle housing or are looking to purchase your first set of replacement ball joints? If so, non-knurled ball joints are what you are looking for. Ball Joints are typically offered in two fitment styles, knurled and non-knurled. Synergy MFG has been making HD knurled ball joints for years intended as replacements for those looking for better ball joints after going through several sets of OEM style ball joints that simply don't hold up to the rigors of off-road use and large tires. Knurled ball joints allow the ball joints to still fit tight in the knuckle "C" bores after the bores have been enlarged from several sets of ball joints being pressed in and out. Knurled ball joints are a "fix" after non-knurled ball joints are no longer a sufficient press-fit.
Synergy MFG's new Non-Knurled HD Ball Joints are ball joints intended to be used in NEW front axle housings or replacing stock, non-knurled type ball joints. If your axle housing already has had knurled ball joints installed or you are on your umpteenth set of ball joints, these are not for you. Look into Synergy MFG's Knurled HD Ball Joints instead.
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