Takea look at this thread these are true coilovers. The gold part is the perch and adjusts up and down on the threads cut into the actual body of the strut.
Coilover kits, commonly termed in the import performance world, are usually kits that allow these types of springs to install onto your current OEM struts or OEM type replacement struts (beit performance or not) They'll come witha threaded sleeve, spring percheds, springs and a few other parts. The large lower perch of your current or conventional strut will most likely need to be cut off, in or to allow the sleeve to slide down as low as possible for rigidity and strength.
The better kits (mainly GC) use a standard race spring at 2.5" diameter and come in ANY rate or length you want or need, as well as helper or tender springs. Helper springs are just there to keep the spring tension when the car fully unloads (i.e. dukes of hazzard airborn, or when jacking up the car) so the spring does not get loose and fall off the its perches. Eibach and Hypercoil make em, but if you order a basic GC kit, you'll have to be spcefic on what rates and lengths you want. You may need to go direct to GC if you want/need different rates that what the kit comes with. I suggest a MAXIMUM of 250# front and 200# rear for street use and even that is kinda pushing it. If your running OEM struts, upgrade them at the same time. You won't be happy with the setup if you don't.
Coilover kits, commonly termed in the import performance world, are usually kits that allow these types of springs to install onto your current OEM struts or OEM type replacement struts (beit performance or not) They'll come witha threaded sleeve, spring percheds, springs and a few other parts. The large lower perch of your current or conventional strut will most likely need to be cut off, in or to allow the sleeve to slide down as low as possible for rigidity and strength.
The better kits (mainly GC) use a standard race spring at 2.5" diameter and come in ANY rate or length you want or need, as well as helper or tender springs. Helper springs are just there to keep the spring tension when the car fully unloads (i.e. dukes of hazzard airborn, or when jacking up the car) so the spring does not get loose and fall off the its perches. Eibach and Hypercoil make em, but if you order a basic GC kit, you'll have to be spcefic on what rates and lengths you want. You may need to go direct to GC if you want/need different rates that what the kit comes with. I suggest a MAXIMUM of 250# front and 200# rear for street use and even that is kinda pushing it. If your running OEM struts, upgrade them at the same time. You won't be happy with the setup if you don't.
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