I'm sorry to burst your bubble, but there are none!
Some are better than others with respect to RFI, EMI, etc., but all of them require some sort of noise abatement to make them usable. This includes diesels, most of which now use electronic injection systems like gas engines.
COP (Coil Over Plug) systems are a mishmash of good and bad, and no one maker is better than the others. Hy-bred systems are the worse ones (like GMs Gen III and Gen IV OHV engines).
Every vehicle out there will benefit from proper bonding.
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