Exhaust - do you want OEM or Performance ? You can get a Magnaflow exhaust or Flowmaster which is better suited for the V8's or the Borla Bullet. You can either choose to delete the resonator or keep it. Keeping it will not make much of difference in sound. I deleted mine. You could even get a high flow cat while you are at it !!
The headers look a little beat up, and look like they are rusting. Its the inline 6, so anything I could get some good sound out of, and keep some good power with. I like flowmaster but people tell me to go with magnaflow.
And whats the best spark plugs, and spark plug wires I can get for my car. Once again its a 1990 mercades benz 300e.