Yoshimura · AT2
The Yoshimura AT2 Street Series 3/4 Exhaust is a stainless exhaust system built for the Kawasaki ZX-6R 2019–2026. Developed by Yoshimura R&D of America, Inc., it’s designed to sharpen the bike’s character with a distinctive AT2 exhaust note and a race-inspired look.
This system features Yoshimura’s Works Finish with an aggressively styled matte finish carbon fiber end cap and heal guard, plus a facet-formed tip. It also includes the INS-20-K sound insert. For exact application details, refer to the fitment table on the page.
Yoshimura’s Works Finish gives the AT2 an aggressive appearance with a matte finish carbon fiber end cap and heal guard, complemented by a facet-formed tip. The design brings a focused, track-influenced look to the ZX-6R while matching the AT2 Street Series identity.
This AT2 3/4 system is listed at 5.3 Lbs. compared to the stock muffler weight of 16.1 Lbs. The result is an incredible 10.8 pound weight savings as stated in the product description, making it a compelling upgrade for riders focused on shedding weight.
An INS-20-K sound insert is supplied with this system, and it’s also listed as included in the specifications. The product listing also provides sound figures using j2825 sound testing standards, with readings shown at 5000 rpm and at 2000 rpm.
Engineering
Created specifically for the Kawasaki ZX-6R 2019–2026, this Yoshimura AT2 Street Series 3/4 Exhaust reflects ongoing refinement from the Yoshimura R&D team. It’s positioned as a purpose-built system for this middleweight sport platform, pairing stainless construction with the AT2 series design elements. Confirm the exact model-year coverage in the fitment table shown on the page.
Materials
The AT2 brings together Yoshimura’s Works Finish and distinctive component styling to deliver a bold, modern look. Key visual elements called out in the product description include an aggressively styled matte finish carbon fiber end cap and heal guard, plus a facet-formed tip that completes the AT2 silhouette. Product photos and the product video on the page provide a closer view of these design cues.
Sound
Yoshimura highlights the signature AT2 exhaust note as part of the experience, and the listing includes sound information measured using j2825 sound testing standards at 5000 rpm and at 2000 rpm. The included INS-20-K sound insert lets the system be configured as specified, and the sound insert table on the page shows other related options.
Installation
This product page includes supporting media to help with purchase and setup decisions, including a dyno chart, product video, and an installation PDF. Those resources are presented alongside the system details so riders can review the manufacturer-provided documentation and visuals before installation on a Kawasaki ZX-6R 2019–2026.
| Part Number | 14642CP522 |
|---|---|
| Brand | Yoshimura |
| Product Line | Street Series Exhaust System |
| Series | AT2 |
| Material | Stainless |
| Sound Insert (Included) | INS-20-K |
| Shipping Weight | 10 lb |
| Barcode | 00840025915619 |
| Emissions Compliance | QUALIFIED MANUFACTURER DECLARED "REPLACEMENT PART" |
| Make | Model | Model Years |
|---|---|---|
| Kawasaki | ZX-6R | 2019–2026 |
Fitment as listed by Yoshimura for part number 14642CP522.
| Part Number | Type | Included With This System |
|---|---|---|
| INS-20-K | Sound Insert | Yes |
| INS-27-K | Sound Insert | No |
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
