Spec:
Muffler Style: Hi-Power409
Style: HP
Material: S4 SUH409 Stainless that are used for many stock parts
Tip O.D.: 120
Pipe Size: 75
Consist of: 2
Close Sound Level Stock/HKS: 94/97
Idling Sound Level Stock/HKS: -/73
Check HKS page for details

For SW20 MY 10/1989 - 09/1999

Features:
The real street sports muffler.
Hi-Power 409 mufflers offer a cost effective solution for your sports muffler needs. The rear section is made from SUS304 grade stainless steel for a high lustre finish and the piping section which is not visible once fitted is made from coated SUH 409, reducing the cost. SUH409 has other benefits such as being more resistant to thermal expansion and improved acoustic properties. SUH409 has the ability to absorb more sound than SUS304 which allows Hi-Power 409 mufflers to have a straight through design without fear of excessive noise.

- Efficient exhaust gas flow by the pipe layouts.
- Agressive exhaust sound.
- "JASMA" approved.
- The material of main silencer and tip is SUS304. Pipe portion, which is difficult to see are made of SUH409. This combination enables good appearance and high cost performance.
- Proven "Advantex* glass wool" (Continuous fibeer glass wool).
* Advantex is a registered trademark of Owens Corning.