borfoo3
New member
I feel like I'm enabling lazy behavior to address questions that have already been asked and answered hundreds of times in multiple threads which I was able to find simply by typing "spacer lift" into the search bar, but ... it's Sunday and I have nothing better to do.
If you do any off-roading at all, any front spacer lift is a bad idea, and a spacer lift of over 2" is a really bad idea. Spacer lifts decrease the available suspension travel in the downward direction ("droop") and cause the shock to become the limiting factor. This can result in eventual catastrophic failure of the shock.
If you could afford $45K-plus for a TRD Pro, you can probably afford a few hundred more for a proper front suspension lift.
Any lift over 2.5" reduces front wheel caster to the point that aftermarket UCAs become a good idea. Reduced caster doesn't technically hurt anything, but it's up to you whether driving around in a vehicle that wants to wander all over the road is acceptable. I have about a 2.5" front lift and stock UCAs allowing me a max of about 2.5º of caster. It's not great -- I especially notice it in crosswinds or on tilted roads -- but I decided I can live with it.
3" is about the practical limit for any lift without doing other major modifications, and even at 3", the design of the IFS suspension is about maxed out.
If you read through the numerous existing spacer lift threads, I don't think you'll find many off-roading owners who are happy with the spacer lift in the long term -- most say they wish they had gotten a "real" suspension lift from the outset.
There, that just saved you precious seconds of search time!
^^^^This plus one comment from my side: This write-up fits perfect for any stock 4Runner, except the TRD pro I believe is already 'lifted' 1 inch or so up front.. so I'd keep that in mind when considering the available lift height before getting into UCA's/ CV binding angles...etc.
As others have mentioned in one form or another: spacers, at best, will not improve your ride. At worst, will detract the overall ride/ suspension performance.. but is the cheapest way to get the lifted 'look'
For function (i.e. best performance), lifting by a proper spring/ shock combo works best.