Here I go again...

I would be considering HP & torque gains, not coatings and materials... Hell, I'd take a set of headers made of cardboard and coated with cow dung if they gave me a 20 hp gain...

All due respect guys, I've done a bit of homework pm this subject... Yes, a properly designed set of headers will give us about 2.5% HP increase over the OEM without other modfifications... And you will need to spend somewhere in the range of $1,500 to $3,000 to have them custom built...

If somebody says they will build you headers for less, (RUN AWAY)