I'm going to give you the straight scoop with this KYB Strut Plus review. First of all I don't think you can go wrong with anything that KYB makes if you like a firm ride. KYB is the original equipment supplier to many of the Japanese cars sold today.
If you're looking for a Cadillac ride, don't buy KYB's. Get Monroes or Bilstiens. The great thing about the KYB Strut Plus is you not only get a new strut, but you also get a new spring and strut mount bearing assembly and it's fully assembled so all you have to do is swap out the whole unit. Unlike previously where you had to have a spring compressor to replace the strut only.
For High Mileage Vehicles
This is the perfect setup for a vehicle that has over 100k on the clock because I can pretty much guarantee you the springs are dead. While replacing the struts is a good thing, doing it with dead springs is only fixing it half way and the quality of the ride will reflect that. If the springs are worn-out the vehicle will still bottom out even with new struts.
How do you know if you should buy the KYB Strut Plus or just install a strut cartridge? My rule of thumb is if the vehicle has over 100,000 miles on it I recommend to my customers to go with the Strut Plus. If the the car only has 50 to 70K I'm good with only installing strut cartridges. Between 70 and 80K is a grey area for me and I recommend on a case by case basis.
I've been installing KYB's for over 25 years and for the most part I think they're worth every stinking penny. They are one of the few things that after you install them on your vehicle that you actually feel like you got your moneys worth. I've been telling customers for years that I'll buy them a steak dinner and give them their money back if they don't like them after I install them on their vehicle. They're that good.
My Own Personal Results
When the KYB Strut Plus first came out, I installed them on a 91 Dodge Caravan that was a taxi and had over 200K on it. My customer was ecstatic afterwords because he'd already replaced the struts before and while it rode better it just wasn't “right”. After installing the strut/spring assembly he said it drove and rode better than it had in the last 100,000 miles. You just can't go wrong with a strut, spring and bearing plate assembly.
Buy or Don't Buy?
Yes, buy them, they're great! And you can order the Kyb Strut Plus from Amazon and get FREE shipping!