Improving performance?
 

Anyone have any ideas on how to improve performance? My 2006 C70 is really sluggish taking off. It's hard to believe this car has 218 horsepower... it feels more like 160.

I don't want to radically revamp the engine. Was just thinking new plugs, wiring, that sort of thing. I'm not real knowledgeable about cars, so would love to hear any ideas.