HKS 3306-RA074 Inner Silencer 120mm Drager Tip Black Painted SUS304 Universal

Vehicle Fitment

• Universal - fits any HKS exhaust system equipped with a 120mm Drager (D/M) style muffler tip

Fitment Notes

• This silencer is designed for HKS muffler tips with the 120mm Drager (D/M) tip profile - it is NOT the same as the 120mm Hi-Power tip silencer (3306-RA071), which is shaped for the older round Hi-Power tip; verify your muffler uses the Drager-style 120mm tip before ordering
• Tip inner diameter must be 120mm for this silencer to seat correctly - if your muffler uses a different tip diameter (94mm, 115mm, etc.) or tip style, a different part number is required
• Installation requires M6 mounting holes in the muffler tip - the silencer uses M6 bolts that thread into pre-drilled holes; if your tip does not already have these holes, they will need to be drilled before installation
• The silencer is fully removable - it can be unbolted and removed when maximum exhaust flow is needed, such as for track days or events where sound restrictions do not apply
• Finish is black painted - the coating may show heat discoloration over extended use at the exhaust tip, which is normal for any painted component in this environment

Features

• Reduces exhaust sound output by approximately 7 dB on average - a 7 dB reduction is perceived as roughly half the apparent loudness compared to the unsilenced state, delivering a meaningful noise reduction for street use, residential driving, or noise-regulated environments without requiring any permanent modification to the exhaust system
• Bolt-on installation using M6 hardware - the silencer body slides into the 120mm tip opening and is secured with the included M6 bolts and nuts; installation and removal require only basic hand tools and can be completed quickly when switching between quieter street use and track use
• SUS304 stainless steel construction provides resistance to the heat, moisture, and corrosion inherent in the muffler tip environment - matched to the material standard of the HKS exhaust systems it is designed to accompany
• Black painted finish provides a low-key visual presentation inside the tip opening, maintaining a clean appearance at the exhaust exit without the raw metal look of an unpainted insert
• Fully reversible - the exhaust system requires no permanent modification to use this silencer; removing it instantly restores the full unsilenced exhaust character and flow
• Compatible with the 120mm Drager tip found across multiple HKS exhaust series including Drager and Legamax applications using this tip format - a single purchase covers all compatible exhausts the owner may have or upgrade to

Specifications

• Part Number: 3306-RA074
• HKS Product Name: INNER SILENCER D120 D/M
• Compatible Tip Diameter: 120mm
• Compatible Tip Style: Drager (D/M) tip profile
• Material: SUS304 stainless steel
• Finish: Black painted
• Fitment: Universal (for compatible HKS 120mm Drager tip exhaust systems)
• Average Sound Reduction: ~7 dB
• Mounting: M6 bolt-on (requires M6 holes in muffler tip)
• Quantity: 1 inner silencer

Included Components

• 1x Inner muffler silencer, 120mm Drager tip, black painted, SUS304
• M6 bolts and nuts for installation

Product Description

The HKS 3306-RA074 is the inner muffler silencer for HKS exhaust systems equipped with the 120mm Drager (D/M) style tip - designated by HKS as the INNER SILENCER D120 D/M. It is a bolt-in noise reduction insert that slides into the 120mm tip opening and reduces average exhaust sound output by approximately 7 dB, a perceptible halving of apparent loudness that makes a meaningful difference for street driving, residential use, or sound-regulated environments. At the same time, it is fully removable without any permanent modification, preserving the option to run the exhaust at full output whenever the situation permits.

Buyers should note the tip style distinction: HKS produces separate silencers for the 120mm Hi-Power tip (3306-RA071, raw/unpainted) and the 120mm Drager tip (3306-RA074, black painted). Although both are 120mm diameter, they are shaped differently to match their respective tip profiles and are not interchangeable. Confirming which tip style your HKS exhaust uses is essential before ordering. Installation uses M6 bolts threading into holes in the muffler tip - on some tips these holes are pre-drilled from the factory, while on others they must be added before the silencer can be fitted.

The silencer is constructed from SUS304 stainless steel with a black painted finish, consistent with the standard material used in HKS exhaust systems. The black finish provides a clean appearance inside the tip opening. M6 bolts and nuts are included.