Anyone running this kit?
https://www.riactionperformanceshocks.c ... 6-91-turbo
It was shared in a thread on Facebook with several people claiming it was a very nice setup.
Suspension refresh questions
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spacecad3t
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I don't but it's fairly obvious if it is. I should've noted, this refers to late offset strut mounts.
I have installed this on a car, and driven it a bit. Hard to judge ride comfort since the car to begin with has race seats, not stock seats. There were some fitment issues with the front struts to the spindle, I had to dremel and touch up where I had to clearance it. The big thing is they are bending and breaking the rear coilovers and the bolts. I haven't contacted them to get their parts kit to update the old ones, but from what I heard their other "fix" was to jack up the rear spring rate into the moon, which will make the car understeer like a mfer.
Generally speaking, unless you seriously know what you are doing, stick to the torsion bars. I am going to be running old LEDA coilovers on my car, but I have some experience already and they give me advantages over torsion bars for my car's specific use case.
Porsche 944S2 5MT '91
BMW E39 540iT 6MT '00
Mercedes-Benz W201 190E 2.6 5MT '89
IG: @stitch2k1
BMW E39 540iT 6MT '00
Mercedes-Benz W201 190E 2.6 5MT '89
IG: @stitch2k1
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spacecad3t
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Thank you!stitch2k1 wrote: Thu Dec 25, 2025 1:51 pm I have installed this on a car, and driven it a bit. Hard to judge ride comfort since the car to begin with has race seats, not stock seats. There were some fitment issues with the front struts to the spindle, I had to dremel and touch up where I had to clearance it. The big thing is they are bending and breaking the rear coilovers and the bolts. I haven't contacted them to get their parts kit to update the old ones, but from what I heard their other "fix" was to jack up the rear spring rate into the moon, which will make the car understeer like a mfer.
Generally speaking, unless you seriously know what you are doing, stick to the torsion bars. I am going to be running old LEDA coilovers on my car, but I have some experience already and they give me advantages over torsion bars for my car's specific use case.
This is likely not a great photo, but I noticed this gap in my mounts, should I look closer? I hadn't taken much notice, my suspension is not awful, just aging.
Interesting, was not aware of that.
I actually ended up purchasing Prekom rear spring plates with the bushings pre installed. I didn’t want to deal with removing them.
With that said, I have the elephant racing spring plates bushings I didn’t use. Happy to sell them for 20% less of the posted cost.
I am not super knowledgeable about what happens as it does this and fails, I just know it's not supposed to do that.spacecad3t wrote: Thu Dec 25, 2025 2:09 pm This is likely not a great photo, but I noticed this gap in my mounts, should I look closer? I hadn't taken much notice, my suspension is not awful, just aging.
But if you're spending the money elsewhere, make that investment imo.
Porsche 944S2 5MT '91
BMW E39 540iT 6MT '00
Mercedes-Benz W201 190E 2.6 5MT '89
IG: @stitch2k1
BMW E39 540iT 6MT '00
Mercedes-Benz W201 190E 2.6 5MT '89
IG: @stitch2k1
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spacecad3t
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Well, I have looked at many of the options mentioned across various threads. Im a little torn based on what I read. I was leaning toward monoballs, because the price isn't much higher and they come off as a significant improvement. However, since my car will mainly be a daily driver and it current kept on the street, I read that monoballs, even the weather sealed ones are prone to corrosion if not greased/used often enough. I would hate to invest in them and then find their life is even further diminished from how little I drive the car throughout the winter...
So with that- I think I would likely benefit from the cost savings and performance of an elevated rubber bushing. With that, the elephant racing rubber bushings do review well and come in a sport hardness- which I think is a good compromise for my goals.
I saw that some suppliers sell Delrin, which was appearing at first, but from further reading- Im not sure I want to go with Delrin on a car not dedicated to the track.
As for struts/coil overs- I'm leaning toward the ground control kit. It looks super nice and is competitively priced against other kits with adjustable plates.
I documented some of the different combinations I looked at. All of the monoball "kits" are roughly the same price... I feel like the Elephant racing components are the nicest? However, the Rennline kit also looks to be very well made and from what I read, is actually Prekom components?
Thoughts/feedback anyone?
So with that- I think I would likely benefit from the cost savings and performance of an elevated rubber bushing. With that, the elephant racing rubber bushings do review well and come in a sport hardness- which I think is a good compromise for my goals.
I saw that some suppliers sell Delrin, which was appearing at first, but from further reading- Im not sure I want to go with Delrin on a car not dedicated to the track.
As for struts/coil overs- I'm leaning toward the ground control kit. It looks super nice and is competitively priced against other kits with adjustable plates.
I documented some of the different combinations I looked at. All of the monoball "kits" are roughly the same price... I feel like the Elephant racing components are the nicest? However, the Rennline kit also looks to be very well made and from what I read, is actually Prekom components?
Thoughts/feedback anyone?
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spacecad3t
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I got some input from a friend with some real world suspension experience. He suggested I go with compound for the front bushings and bearing/monoball for the rear/caster block. So that is what I did. I went with Elephant Racing's sport rubber front bushings and their monoball blocks. I'll report back how it goes/outcomes.
As for shocks- I'm still leaning toward the ground control setup, doing a lot of price/effort comparing, it just seams to be the most value. Although, I watching a set of struts on eBay, maybe I just cut-a-strut/coil over those...
As for shocks- I'm still leaning toward the ground control setup, doing a lot of price/effort comparing, it just seams to be the most value. Although, I watching a set of struts on eBay, maybe I just cut-a-strut/coil over those...
Last edited by spacecad3t on Mon Jan 05, 2026 4:48 pm, edited 1 time in total.
- PSU_Crash
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Thanks for listing out your options! At some point mine will be getting the suspension refreshed also. Good information here 
'86 Zermatt Silver 944 N/A 
'86 Mitsubishi Starion - Purpose built SM class Autocross car
'87 Chrysler Conquest - Mid LS Swap
'86 Mitsubishi Starion - Purpose built SM class Autocross car
'87 Chrysler Conquest - Mid LS Swap
- walfreyydo
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I replaced every rubber bushing on my car with Powerflex polyurethane.spacecad3t wrote: Wed Dec 31, 2025 8:15 am Well, I have looked at many of the options mentioned across various threads. Im a little torn based on what I read. I was leaning toward monoballs, because the price isn't much higher and they come off as a significant improvement. However, since my car will mainly be a daily driver and it current kept on the street, I read that monoballs, even the weather sealed ones are prone to corrosion if not greased/used often enough. I would hate to invest in them and then find their life is even further diminished from how little I drive the car throughout the winter...
So with that- I think I would likely benefit from the cost savings and performance of an elevated rubber bushing. With that, the elephant racing rubber bushings do review well and come in a sport hardness- which I think is a good compromise for my goals.
Good improvement over stock rubber but not as harsh as solid monoballs. After install the car felt great: tight and responsive but not too harsh. A good compromise for a car that is primarily autox but still sees some street driving to/from events and summer cruises. Powerflex also comes in two different hardnesses for some of the mount points (purple and black). Ive been very happy so far and they have stayed quiet over the last 5 years Ive had them. Also much more cost effective than Elephant.
https://www.powerflexusa.com/shop/categ ... Y5Ep8gRFkh
Even though the page says 85-91, some of them will fit earlier cars.
Last edited by walfreyydo on Tue Jan 06, 2026 5:44 am, edited 1 time in total.
89 S2 Variocam, Megasquirt DIYPNP
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spacecad3t
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Thanks for confirming that. I used powerflex on my Vanagon and really liked the product. I plan to use poweflex when I rebuild my sway bars this spring.walfreyydo wrote: Tue Jan 06, 2026 5:38 am Even though the page says 85-91, some of them will fit earlier cars.
