The Y2 Sonata was built from Mitsubishi drivetrain parts so there is every chance that coil overs from something like a Galant will fit. Added bonus is the Galant VR4 was a popular tuner car so there are aftermarket parts available. I know the early Excel used the entire front subframe and engine/trans assembly from the Mitsubishi Colt and it was nut and bolt interchangeability. Do some more research to verify.
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