Spacer lift vs. preload collar lift kit explanation

Old Spice

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I see that Westcott used a preload collar lift (pre-collar lift) on their 4Runner build and thought this was the same as a spacer lift kit. Turns out they're not the same.

A pre-load collar lift adds preload to your existing suspension springs by using a collar, effectively lifting the vehicle with minimal changes to the suspension geometry.

More specifically - like a coilover, it puts more preload on the spring, retains factory travel, still uses factory bump stop (doesn't take all the force on factory shock), and doesn't bottom out prematurely. It also helps redice dive and body roll.

Here's how Westcott explains the difference:

 
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Keroppi

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Helpful. Sounds like precollar lift kit is an intermediate lift option between a cheap spacer lift and a full coilover suspension system then.
 
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