What is the main purpose of this inner silencer?

The main purpose of this HKS inner silencer is to reduce the overall sound output of your exhaust system. It helps to quiet down the exhaust note, making it a good option for those who want a less aggressive sound.

What material is this silencer made from?

This HKS inner silencer is constructed from stainless steel. This material is chosen for its durability and resistance to the high temperatures and corrosive conditions found in exhaust systems.

How is this silencer installed?

This silencer is designed to install directly inside the muffler body of compatible HKS mufflers. It's a replacement part intended to be a straightforward installation for those familiar with exhaust components.

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Specifications

Brand: HKS
Part #: 3306-RA071
UPC: 4957266923467

HKS 120Hiper Inner Silencer Assy

Name: HKS 120Hiper Inner Silencer Assy
Brand: HKS
Price: 62.98 USD
Availability: InStock

$62.98

On Backorder — Expected to ship by Apr 19, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

HKS 120Hiper Inner Silencer Assy. Reduces exhaust noise for your HKS muffler.

Key Features

Fits select HKS muffler models.
Constructed from stainless steel for durability.
Helps reduce exhaust noise levels.
Installs inside the muffler body.
Designed to maintain exhaust flow while quieting sound.

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Product Details

Constructed from durable stainless steel, this HKS 120Hiper Inner Silencer Assy is designed to fit specific HKS muffler models. Its primary function is to reduce the overall sound output of your exhaust system, making it a popular choice for those looking to quiet down their vehicle's exhaust note without sacrificing performance.

This silencer is a well-built component that installs directly into the muffler body. It works by altering the flow of exhaust gases within the muffler, creating back pressure and absorbing sound waves. The stainless steel construction ensures it can withstand the high temperatures and corrosive environment found in exhaust systems, offering a long service life.

If you're looking to tune the sound of your HKS exhaust system or meet local noise regulations, this inner silencer is a straightforward solution. It's a direct replacement part for compatible HKS mufflers, making installation a simple process for most DIYers.