Smart Car 451 Performance Header and Exhaust Install Complete! I put the Cat down! Part 3 of 4

[@Emazingridez10000]

We're you get the parts?

[@leatherguru8904]

Can't seem to find this header. Suggestions?

[@pistaxotube]

Did check engine light pop? If so, hiw did you resolve the issue? Thanks

[@milanoman2144]

What was the horsepower gain