Description
The Mishimoto Sound Generator Delete Kit (MMAF-SUB-SGD) is a purpose-built aluminum CNC plug and rubber cap set designed to silence the factory sound symposer that pipes engine noise into the cabin through the intake system. Machined with a polished silver finish and stamped with the Mishimoto logo, this plug is engineered to seat directly into the intake hose while the included rubber cap seals off the sound diaphragm.
Many modern vehicles route amplified engine noise from the air intake system straight into the cabin via a sound symposer, and while some drivers enjoy the effect, others prefer a quieter cabin without that constant induction drone. This Mishimoto kit gives you a clean, reversible way to remove that noise without touching your factory air intake filter, air filter diameter, or overall intake plumbing — it’s strictly a symposer delete, not a performance cold air intake or filter upgrade. Installation is straightforward: the aluminum CNC plug installs into the intake hose and the rubber cap covers the sound diaphragm, with the whole job taking about 10 minutes.
Vehicle Applications
This sound generator delete kit is built to fit the Scion FR-S Base from 2013–2016, the Subaru BRZ across Limited (2014–2020), Premium (2013–2019), Series.Blue (2015), Series.Gray (2019), Series.HyperBlue (2016), Series.Yellow (2017), and TS (2018 and 2020) trims, the Subaru WRX STI Base, Launch Edition, and Limited trims for the 2015 model year, and the Toyota 86 Base from 2017–2020. Listed engine and chassis codes for this application are EJ257 and FA20DIT.
Features
- Fits a range of Subaru, Scion, and Toyota vehicles equipped with a sound generator tube
- Eliminates engine noise being routed into the vehicle cabin through the sound symposer
- Aluminum CNC plug with Mishimoto logo for the intake hose
- Includes a rubber cap for the sound diaphragm, where applicable
- Quick and easy installation, typically completed in about 10 minutes
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMAF-SUB-SGD
- Product Type: Air Intake Systems accessory (sound generator delete)
- Color: Silver
- Finish: Polished
- Material: Aluminum
- Engine Codes: EJ257, FA20DIT
- Chassis Codes: EJ257, FA20DIT
- Includes: (1) CNC Plug for the air intake hose, (1) Rubber Cap for the sound diaphragm (if applicable), Mishimoto Lifetime Warranty
Frequently Asked Questions
What does the Mishimoto Sound Generator Delete Kit (MMAF-SUB-SGD) do?
It removes the noise pumped into the cabin by a vehicle’s sound symposer system by installing an aluminum CNC plug into the intake hose and a rubber cap onto the sound diaphragm.
Which vehicles is this kit designed to fit?
It fits the Scion FR-S Base (2013–2016), Subaru BRZ Limited (2014–2020), Premium (2013–2019), Series.Blue (2015), Series.Gray (2019), Series.HyperBlue (2016), Series.Yellow (2017), and TS (2018, 2020), the Subaru WRX STI Base, Launch Edition, and Limited trims for 2015, and the Toyota 86 Base (2017–2020).
How long does installation take?
Installation is a snap and takes about 10 minutes to complete.
What is included with the MMAF-SUB-SGD kit?
The kit includes one CNC plug for the air intake hose, one rubber cap for the sound diaphragm (if applicable), and the Mishimoto Lifetime Warranty.
What material and finish is the plug made from?
The plug is made from aluminum with a polished finish and is available in silver, featuring a Mishimoto logo.
Does this kit include an air filter?
No. The TechSpec listing shows Filter Diameter and Air Filter Part Number as N/A, confirming this kit does not include or modify an air filter; it is strictly a sound symposer delete for the intake hose and sound diaphragm.
âš WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Not CARB approved. This item is not legal for sale or use on pollution-controlled motor vehicles in California or states that adopt California emissions standards. Intended for off-road / competition use where permitted by law.
