Spring spacers and strut spacers are two compleatly differant things. Every coil sprung pickup running around with a leveler kit is running the strut spacers, I even have them on my 05 F150. A spring spacer that twists into the coil spring is very dangerous and weakens the springs. Strut spacers are installed by about every car dealer around and maintains factory warranty, They are safe, and I have ran mine since 2000 or 2001 and about 120,000 miles. My Kia handles better now than it ever did stock.

Just my 2 cents, Dennis

95 Sportage, gone but not forgotten.
98 Jeep TJ, 4" Zone springs with RC Long arms, Ford 8.8", 4.56 gears & Detroit locker rear, D30, 4.56 & Detroit Trutrack front.