Yoshimura · AT2 · Slip-On
The Yoshimura CB1000 25-26 AT2 Stainless Slip-on Exhaust is a Street Series Exhaust System built to sharpen the character of the Honda CB1000-Hornet 2025–2026. Designed as a slip-on system, it targets a stronger, more aggressive sound and measurable performance gains while updating the bike’s overall look.
Yoshimura reports up to 4.2% more HP @10,000 rpm and up to 3% more torque @9,600 rpm. It is not compatable with some international models with exhaust control valve; confirm fitment details before purchase using the fitment table on this page.
Built as part of Yoshimura’s Street Series Exhaust System lineup, the AT2 slip-on is tailored specifically for the CB1000-Hornet 2025–2026. The slip-on format offers a focused upgrade for riders looking to enhance sound, appearance, and power delivery without changing to a full system.
Backed by the manufacturer’s published results, this AT2 slip-on delivers verified performance claims for the Honda CB1000-Hornet. Yoshimura reports up to 4.2% more HP @10,000 rpm and up to 3% more torque @9,600 rpm; see the dyno chart shown on the page for the documented output curve.
The features data notes Stock system: 12.2 lbs. and Yoshimura AT2: 5.5 lbs, supporting a lighter exhaust setup. Refer to the specifications table for additional listed details, including shipping weight.
Engineering
This exhaust is part of Yoshimura’s AT2 series within the Street Series Exhaust System family, engineered as a stainless slip-on for the Honda CB1000-Hornet 2025–2026. The design focus is to complement the bike’s 1000cc inline 4 character with a more assertive exhaust presence and a refined, purposeful look consistent with Yoshimura’s Street Series direction.
Performance
Performance is supported by the manufacturer’s verified claims and the dyno chart presented on the page. Yoshimura reports up to 4.2% more HP @10,000 rpm and up to 3% more torque @9,600 rpm. These figures reflect the intended goal of improving output across the rev range while pairing the CB1000-Hornet with the distinct AT2 sound signature.
Sound
Sound insert options are listed on the page by code, and the table indicates whether each is included. Use those listings to choose the setup that matches the desired sound profile.
Fitment
Fitment for this slip-on is specified for Honda CB1000-Hornet 2025–2026, as shown in the fitment table. The manufacturer also notes it is not compatable with some international models with exhaust control valve, so riders should verify model configuration before ordering. Installation guidance is supported by an installation PDF available on the product page.
Figures as reported by Yoshimura.
| Part Number | 12150BP520 |
|---|---|
| Brand | Yoshimura |
| Product Line | Street Series Exhaust System |
| Series | AT2 |
| System Type | Slip-On |
| Material | Stainless |
| Shipping Weight | 10 lb |
| Barcode | 00840025919532 |
| Emissions Compliance | QUALIFIED MANUFACTURER DECLARED "REPLACEMENT PART" |
| Make | Model | Model Years |
|---|---|---|
| Honda | CB1000-Hornet | 2025–2026 |
Fitment as listed by Yoshimura for part number 12150BP520.
| Part Number | Type | Included With This System |
|---|---|---|
| INS-27-K | Sound Insert | No |
| INS-20-K | Sound Insert | No |
| INS-35-K | Sound Insert | No |
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
