Titanium - Produces a ripping high pitched exotic sports car sound- better and lighter than stainless. (cannot be heat shielded)
Inconel 625 - Produces a ripping high pitch exotic sports car sound- better, lighter than stainless, and 100 times more durable than titanium.
Double-layer heat shielding- is used to protect surrounding parts, wires, and hoses against radiant heat from the downpipes. Integrated thermal insulation reduces surface temperature by up to 70%! What makes it an absolute winner, compared to usual thermal wrapping or ceramic coating. It’s very important not just for safety reasons but also to affect engine performance by reducing the underhood temperature.