All M4 Quiet Inserts are compatible only with M4 Exhaust Systems that retain the quiet insert using a snap ring. All M4 Quiet Inserts are compatible with new purchases. If you would like to purchase a quiet insert for an M4 System purchased more than two years ago from STG the insert will only fit your system if it is retained using a snap ring.
All M4 Exhaust listings on our website list which quiet inserts are compatible. You can easily determine which quiet inserts are compatible with your M4 exhaust system by referring to your exhaust's listing on our website.
You can expect a db reduction that ranges from 1-2 db on a Stage 1 Quiet Insert and 3-4 db Stage 2 Quiet Insert. Please understand that every bike is unique which influences the db reduction of the M4 Quiet Insert from one motorcycle model to the next.
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Emissions Notice to Customers in California |
Important Emissions Notice to Customers in California
The State of California prohibits the offer for sale, sale, or installation of an aftermarket part, which alters or modifies the original design or performance of a motor vehicle's pollution control devices or systems, unless the aftermarket part has first been exempted from the state's anti-tampering laws and been issued an Executive Order (EO) number by the California Air Resource Board (ARB). Legal in California only for racing vehicles which may never be used, or registered or Licensed for use, upon a highway. Any California Residents who order this M4 Exhaust from Sportbike Track Gear llc agree they are doing so with the intention of using it on a closed course as outlined within the California Notice.
Write Review
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DB reducer
It was hooked up ny a bolt and not an oh Jesus clip. Not that big of a deal. The item worked well in reducing the loudness of the exhaust. I love it
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M4 stage 1 insert
It's still loud but In a good way, still sounds very good and loud enough to be heard for a few blocks instead of a few miles.
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Works Great
Bought the Q6 version for my X96 system and works great definitely a good bit quieter.
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M4 exhaust baffle
Works great.
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Not what I expected
The smaller dB reducer that came in my muffler is quieter. The stage 2 dB reducer doesn't look exactly as the photo. The device is a smaller diameter and doesn't fit exactly center of the muffler. I considered sending it back, but I already did a test ride with it.
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M4 EXHAUST Q3 QUIET INSERT
Easy snap ring install, 7Db reduction at idle compared to no baffle, same at 3000rpm, further 4 Db at idle and 3000rpm with batting, 12 Db reduction at 6000rpm. This was on a 2011 ZX6R with an M4 GP slip-on.
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M4 exhaust insert
Helped quiet the bike but still has a nice deep sound.
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Noticeable Difference
My home track has a db level limit in place and once I noticed how loud the M4 Full exhaust could possibly be (at idle) I figured it would make sense to purchase this baffle. Luckily I didn’t have to use it but you can hear the difference with it in versus out.
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Silencer
Making the bike a little more quite and still sound good
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