TOG (extreme version) and ZZP are the best headers and also the most expensive. For most setups and most people the cheapo SSC/Speed Daddy Headers are a good option.
Borla mufflers sound the best. Still doesnt sound good really. I have TOG xtremes and a full borla system except without a cat and a 12" cherry bomb for a resonator. When its not leaking it sounds decent and not overly droney but its still not really good sounding. Especially at like 1500-2200 RPMs. But it helps get my car noticed as modded beyond the blower noise level.
But yeah nothing past the downpipe does anything for performance really unless you go turbo.
