- Size is 170 millimeter shell
- Tip diameter is 120 millimeter
- Piping diameter is 75 millimeter
The universal HKS high-powered muffler assemblies are the same high-quality units that are used in the HKS bolt-on exhaust systems. The 170mm and 130mm high-powered muffler shell designs are available in 75mm and 60mm (respectively) piping diameters for use with custom exhaust applications.