In hopes this becomes a sticky.... It appears even after several threads/posts created on a monthly basis, the same question still arises, "should I use a leveling kit, lift block, spring spacer, hockey puck, two-by-four, frying pan, etc, or should I do the perch adjustment to level my Raptor?" The short answer is; perch adjustment. Why? Because a spacer block of any kind allows the suspension to droop the additional amount adjusted, over extending components like the upper ball joints and cv shaft joints. This shortens the life of your components and could even cause separation of the upper ball joint under extreme conditions.
For more information, visit this thread
http://www.fordraptorforum.com/f5/why-spacers-bad-idea-lots-cv-axle-innards-pics-11645/
And this thread
http://www.fordraptorforum.com/f5/40k-mile-suspension-checkup-binding-blown-shock-bent-frame-10550/
And this thread
http://www.fordraptorforum.com/f9/another-reason-why-15677/
For more information, visit this thread
http://www.fordraptorforum.com/f5/why-spacers-bad-idea-lots-cv-axle-innards-pics-11645/
And this thread
http://www.fordraptorforum.com/f5/40k-mile-suspension-checkup-binding-blown-shock-bent-frame-10550/
And this thread
http://www.fordraptorforum.com/f9/another-reason-why-15677/
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