CSB Pro Series (Set of 2) | Shore 65±5 HA

Coil spring boosters are not new. Superior Automotive has sold them for years through OReilly Auto and other auto stores, Speedwaymotors which caters to circle track racing has also sold them.However, these RubberShox have the variety of sizes to actually most likely fit your car, unlike the limited previously mentioned offerings.Some advice regarding fit:- The diameter of the booster is not as important as the spacing between the coils (corresponds to the H2 on the booster) and the actual coil rod diameter (G2 on the booster).- You MUST pick a booster that has a smaller H2 dimension than the spacing between your extended coil spring. It CANNOT be close or bigger. I originally got the A size for my car thinking that even though the H2 at 1.85" was close to my spring spacing of 1.75" I could force it. Wrong. Brutally wrong. There must be free space to feed the booster onto the coil. Even with the B size I got, which has an H2 of 1.22" getting the booster on still took some serious pushing and finger strength.- Most springs have smaller spacing between the coils towards their ends. Hence, I installed these boosters near the middle of my springs and then rotated them towards the end of the springs. This wedged them into place. Even though zipties were included with my boosters there were no holes in my boosters for them, and I wouldn't nor saw any need to drill holes in my boosters to use the zipties.- Rubbershox says you can use WD40 to mount these. That's controversial as people have said WD40 deteriorates rubber, I used soapy water.The results are fantastic. Concerning raising the rear ride height, that is negligible. Immediately after install there was an increase of 1/2", but it didn't take long for that to settle out right back to the original height. But under dynamic load and motion it is obvious that the rate of my rear springs has noticeably increased. Cornering is spectacularly better. Even at low speeds in parking lots the steering is noticeably tighter. At higher speeds there simply is less body roll, and hence less steering input is needed.I'm content enough that I don't feel the need to get boosters for the front. I have the Pro for the rear (black) and was going to get the standard (red) for the front, but I'm fine with how the thing handles for now. I do recommend for most vehicles that the rear be stiffened before the front. Stiffening only the front will promote understeer. Especially on longer vehicles such as vans and minivans stiffening the rear in comparison to the front will aim towards oversteer and sharpen steering input. There is a lot of torsional twist that occurs in longer bodies and stiffening the rear helps counter that. This is definitely a best bang for buck mod for a car like my van.There is no detrimental harshness. Going over speedbumps is clunkier and louder, but it's a compromise I'm perfectly happy with. My only concern at this point is durability, which remains to be seen.

Ok so this adventure started by me trying to find a way to lift my 2019 Kia Niro S Touring. My goal was to get around .5" lift so I could go with a +0 tire size. To start out, stock from ground to highest point on wheel well front was 27.5" and rear was 27.75". After installing the coil cushions front and rear are 28.25". I then changed tire size from 225/45/18 to 225/50/18, this added another .25" so front overall is 1" higher and both front and rear are even.I did drive the vehicle after installing the coil cushions and before putting on the new tires and all I can say is WOW! Before installing the coil cushions at 80mph on the freeway, the car was a very free spirit. After installing the coil cushions, even with worn tires, the car was much more stable, confident, daring you to push it. Before putting on the new tires I didn't quite have the clearance that I wanted, and I may still look into another .5", but I could tell right away, driving on uneven pavement, speed bumps, pot holes, driving down a road that is really just a dry river bed with a sign post, YEAH!!!! This car handles so refined now in the worst conditions that if I knew how much improvement it would be, not sure how much I would have paid but probably at least double.The other thing that impressed me was the ease of figuring out what you need. Look up max vehicle weight to figure out what color. Measure the gap between the coil spring fully extended, jacked up off the ground to determine A through E.If nothing else this product will allow you to drive your Niro/Optima/Prius/Other really low car up on ramps so you can actually change the oil, but reality is that it WILL COMPLETELY transform the handling of your vehicle in my personal experience.

Make sure you measure first and order the correct spacer for your springs.It is incredibly difficult to install it on the vehicle even if the vehicle is on jack-stands.Use lots of soapy water and make sure you clean your springs well before fitting or installation.Keep the rubber well lubricated with soapy water during your install.I installed a strut lift as well that required my strut to be removed before placing it on the vehicle. It was a little easier to put it on this way but I don’t recommend it as it requires a lot of time and patience.There is noise reduction after installmentIt also raises the ride height of your vehicle just a little bitOverall I believe it is 10 out of 10And I will buy some more for my next vehicle

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Got the B+ Pro for a 2013 Ford expedition xl and fits very well in the rear shocks, snug enough to prevent further compression while not to terrible to install.