I would think that one important thing for our cars would be a set of headers, but no one seems to talk about it (at least recently). I know that headers can make a BIG difference in improving the volumetric efficiency (air in, air out faster means HP/TQ gains) of any engine. So if any of you know anyone who does 'em or can make a good set for a 4 liter V8 let me know. Thanks!