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The product is currently on backorder as the stock availability is unable to cater to the demand. Estimated delivery time will be one to two weeks. Payment upfront is needed for order confirmation. Waiting duration varies with the transit from manufacturer and other unforeseen circumstances. Thus, we strongly recommend for your kind patience on such orders. An update via email will be notified of when this item arrives back in stock.


Part Number31021-KN001
Vehicle Model Nissan GTR R35
Diameter of Tip119 x 4
Diameter of Center Pipe85(*3)
Close Noise Level

Stock - L88 R89 / 

Hks    - L89 R90

Flux Welding Type


About HKS muffler

*1: About silencer shell type of Silent Hi-Power
TYPE-S/Oval silencer for noise reduction.
TYPE-H/Round silencer for performance.

*2: Main material in the component figure.

 : SUS304/High quality stainless steel.
 : SUH409/Stainless steel commonly used for stock exhaust.

*3: 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.

*4: 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.

Welcome to the new era