Changed the exhaust on my car for a complte TTI

Bigger tubes? Bigger tubes lead to less torque. I love my TTi headers. They talked me into their step headers when I was leaning toward the 2 1/8". they told me I wouldn't like the torque and at 500 hp I didn't need them that big. That was four years ago. I love my TTi and the ceramic coating is holding up just fine.