Been itching for an upgrade to your SLS AMG? Of course you have. Some may say $8,200 is a lot of money and well, they are right. These headers have 200 cell cats built into them which explains part of the cost. Honestly, hard to justify $8,200 on headers considering the 63 AMG header market but the SLS is a lower production vehicle than say a C63 with a much higher price tag. The headers are also ceramic coated. Gains are claimed as +20 horsepower but we would like to see a dyno.