Code No. 31019-AF134



It achieves sporty sound, weight-saving, and high efficiency.



62% weight saving compared to the stock one
The internal structure employs a straight layout that focuses on exhaust efficiency. It achieves approximately 62% (8.6kg) weight saving by using thin stainless material in the product compared to the stock one. Stock: 13.8kg, SPEC L-2: 5.2kg

Powerful sports sound
You can enjoy the typical sound quality produced by a Horizontally-Opposed boxer engine at the low rpm range. On the other hand, it sounds high-tone sports sound at the high rpm range. It thoroughly eliminates the booming sound that affects the cabin at the normal rpm range.










Cert. No. JQR20222070
Model SK5
Engine CB18(TURBO)
Model Year 20/10 - 
Shape of muffler HP
(Hi-Power SPEC-L II)
Main material S304
Diameter of tip 94 L&R
Diameter of center pipe 50.8 x 2 (*1)
Close noise level Stock 73
HKS 86
About road clearance(*2) Clearance 210mm
Portion of the kit Stock front pipe
Product Weight 5.2kg




About HKS muffler

*1: About center pipe
Diameter of center pipe is the portion that has the largest diameter. (Excluding silencer and tip.) It is the condition with stock suspension.

*2: Minimum road clearance between HKS muffler (Any parts included in the kit) and road surface. Therefore, it may be different from actual road clearance of the vehicle.
The data is basically the condition with stock suspension. However, please understand that some items have data with low down spring or ride height adjustable suspension kit.

Caution: Hook, bracket, stay may be changed without prior notice.

★ Exhaust noise level at idle.