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Discussion Starter #1
The guys at the dealership where I bought my 2017 Pro4x told me there was no problem regarding voiding warranty with a 2" leveling kit.
Armed with this blessing, what is the best spacer to get?
Thanks ,
Logan
 

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The pro4x use bilstein 4600 shocks. They are longer than the black OE shocks. when you add a shock top spacer and hit full compression the shock will bind (crush) before it hits the bump stop. You have a couple of options.

1-buy the prg 2" spacer that comes with a taller lower control arm bump stop
PRG Products
you will get some coil bucket contact at full drop. Get some small bumps for the upper control arm if the noise bothers you.

2-get the 1.5" spacer and avoid a bunch of issues.
PRG Products

3-piece together a ebay spacer, and taller bump
https://www.ebay.com/itm/SR-2-Front-Leveling-Spacer-Lift-Kit-for-05-16-Nissan-Frontier-4WD-2WD-BLACK/272761744301?fits=Model:Frontier&hash=item3f81ddebad:g:HNIAAOSwJq1ZaEis&_trkparms=pageci%3A19c22f08-bf29-11e7-b942-74dbd180f4ed%7Cparentrq%3A789a2b4c15f0a860b4a443bafffaa4ae%7Ciid%3A3

 

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Discussion Starter #5
I'm assuming when you say full compression you're talking fairly serious off road situations?
This truck might see some mud on occasion, but 90% of its travels will be on level surfaces.
Thanks for the info!
Logan
 

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The pro4x use bilstein 4600 shocks. They are longer than the black OE shocks. when you add a shock top spacer and hit full compression the shock will bind (crush) before it hits the bump stop. You have a couple of options.
First time I've heard of this, where did you get this info from?
 

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First time I've heard of this, where did you get this info from?
As my 4 year old would say. "From my brain". Thought it was pretty well known. Let me find you some reference.

"These are PRG billet lift spacers. Kit includes longer urethane bumpstops to prevent the stock shocks (especially Bilsteins) from crushing under full compression." from prg's description on 2" spacer.

I'm assuming when you say full compression you're talking fairly serious off road situations?
This truck might see some mud on occasion, but 90% of its travels will be on level surfaces.
Thanks for the info!
Logan
Yes and no. Generally yes. A speed bump at speed however will have you strike the bumps stop.
 

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As my 4 year old would say. "From my brain". Thought it was pretty well known. Let me find you some reference.

"These are PRG billet lift spacers. Kit includes longer urethane bumpstops to prevent the stock shocks (especially Bilsteins) from crushing under full compression." from prg's description on 2" spacer.
Interesting... Never noticed that bit from Greg. I wonder how much truth there is to that, IE: you bottom the shock before even touching the bumpstop or while compressing the bumpstop the shock bottoms.
 

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Interesting... Never noticed that bit from Greg. I wonder how much truth there is to that, IE: you bottom the shock before even touching the bumpstop or while compressing the bumpstop the shock bottoms.
I was curious as well. Withthe prg 2" spacer installed, stock bump stop, boot off but boot spacer in the stack, the shock compresses perfectly with the LCA jacked up. However I placed a small zip tie on the shaft to monitor travel. Took it down a dirt road to bounce it around and it blew off the zip tie. Put the taller bump stop on and the zip tie survives.

Wonder if anyone has a stock black OEM front shock they would be willing to send me. Assume there are many blown out take offs from people installing Bilsteins.

 

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I was curious as well. Withthe prg 2" spacer installed, stock bump stop, boot off but boot spacer in the stack, the shock compresses perfectly with the LCA jacked up. However I placed a small zip tie on the shaft to monitor travel. Took it down a dirt road to bounce it around and it blew off the zip tie. Put the taller bump stop on and the zip tie survives.

Wonder if anyone has a stock black OEM front shock they would be willing to send me. Assume there are many blown out take offs from people installing Bilsteins.
I can't send you my take-offs (F&R are still good, less than 15k on them), but I can give you measurements... hat to eye they are 16 3/8" unloaded. Shock body is 10 5/8". Compare that to your stock BIL bodies.

How much taller is the taller bump? the difference between a ProX & SV front shock may be a difference of 1/4"... Curious to see what you get for measurements.

.
 

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I can't send you my take-offs (F&R are still good, less than 15k on them), but I can give you measurements... hat to eye they are 16 3/8" unloaded. Shock body is 10 5/8". Compare that to your stock BIL bodies.

How much taller is the taller bump? the difference between a ProX & SV front shock may be a difference of 1/4"... Curious to see what you get for measurements.

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Thanks. That would be much easier then me trying to acquire an old shock. 10 5/8 shock body is top of shock body to eye? If you say the the black shcok is 1/4" shorter that would do it. The yellow bils are a perfect fit, but not when you conside the squish of the stock bump.
 

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Thanks. That would be much easier then me trying to acquire an old shock. 10 5/8 shock body is top of shock body to eye? If you say the the black shcok is 1/4" shorter that would do it. The yellow bils are a perfect fit, but not when you conside the squish of the stock bump.
the 1/4" is a SWAG, you'll need to measure your Bil body. This is just a guess as the only ride-height difference in the FSM is size of tire (and its less than 1/2"). How small a ziptie you use?Try using a mini ziptie like a 3" or 4" and see if they pop
 

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The pro4x use bilstein 4600 shocks. They are longer than the black OE shocks. when you add a shock top spacer and hit full compression the shock will bind (crush) before it hits the bump stop. You have a couple of options.

1-buy the prg 2" spacer that comes with a taller lower control arm bump stop

2-get the 1.5" spacer and avoid a bunch of issues.

3-piece together a ebay spacer, and taller bump

It looks like #2 for my 2012 Pro-4 daily driver. I talked to a local shop this week that has a lot of lift experience to do 2.5 front /1.5 rear. He had gone higher on non-PROs but after research he is not recommending that high for my PRO based on kit supplier concerns. I may go 1.5" in front for now and see ... :frown:
 
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