Hello elm and thank you for your question! Warn Manual Hub Spindle Nut Kit does cover both sides of your 4Runner.
Is this in stock and available for shipment upon ordering? I know it sounds like a silly question, but the last few things I've ordered from you turned out not to be in stock and I didn't find out until I followed up over a week later, after paying for expedited shipping. I ended up having to cancel one and the other I received over two weeks later.
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Yes we have them in stock. These are only needed if converting from automatic hub's.