If it is....you basicly have to rewire it.... The HK amp uses line-level inputs.... AND to make it harder....the speakers on HK cars have a non-std impedance.... So they will damage most radio's/amps given time......
Chris has an HK system he's selling. It from an '06 so you might want to check and make sure it will work. http://www.motoringalliance.com/forums/1st-generation-parts-sale/21248-06-r53-part-out.html#axzz2yxSf9XDZ
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