This is truely a beautiful exhaust.

Inspired and designed from endurance and GT racing in Japan, HKS developed its Hi-Power Exhaust system for both turbocharged and naturally aspirated applications. HKS has incorporated this new race inspired offset muffler and piping design into many street applications, which offers a greater flow and higher-PRM power gains due to the less restrictive design. This is achieved by eliminating unnecessary bends for the straightest exhaust path. For turbocharged applications, the large and smooth exhaust flow allows greater exhaust velocity for better mid-range boost response and high-RPM power. Naturally aspirated vehicles also benefit from greater exhaust flow capacity as engine tuning levels increase. Like Drager Exhaust systems, Hi-Power Exhaust systems are made from SUS304 stainless steel muffler but wrapped in carbon fiber.  Lexus IS300 application- Hi-Power muffler tips are 115mm in diameter, piping diameter 60mm.