Yoshimura AT2 Exhaust Review

Making Kawasaki’s Ninja ZX-6R Screamer Sound and Perform Better

Let’s be real for a second: factory exhausts on modern supersports have gotten massive. Between strict emissions standards and noise regulations, stock mufflers look less like precision performance parts and more like heavy stainless-steel breadboxes slung off the side of your bike.

Enter Yoshimura’s AT2 3/4 slip-on exhaust for the Kawasaki Ninja ZX-6R. We bolted this slick American-made pipe onto our green machine to see if it delivers the performance, weight savings, and ear candy every track-day enthusiast craves.

Here are the top five reasons this exhaust upgrade is worth every penny.

1. Made in Chino, California

There is something deeply satisfying about bolting on gear crafted right here in Chino, California. Yoshimura’s legacy in American road racing runs deep, and that racing pedigree shows in the weld quality, precision fitment, and overall finish of the AT2.

2. Sheds Nearly 10 Pounds

If you want to make a motorcycle handle better, losing unsprung and sprung mass is the single best place to start. The stock exhaust system on the ZX-6R is surprisingly heavy. Swapping it out for the Yoshimura AT2 3/4 slip-on knocks almost 10 pounds off the bike, bringing its wet curb weight down to a lean 422 lbs. You can genuinely feel the difference when flicking the Ninja into tight canyon turns or tip-toeing through low-speed transitions. Check out our motorcycle weight reduction tips for more ways to trim down your ride.

3. Effortless DIY Installation

You don’t need a degree in aerospace engineering or a garage full of specialized gear to get this installed. With basic hand tools—a socket set, some hex keys, and a pinch of patience—you can have the stock can off and the AT2 bolted up in under an hour. It’s an accessible weekend project for garage mechanics of any skill level.

4. Top-Tier American Craftsmanship

Visually, the AT2 is pure eye candy. It features matte-finish carbon fiber end caps paired with a sleek carbon heat shield that seamlessly flows into the lines of the bodywork. It looks aggressive, purposeful, and thoroughly premium—giving the Ninja that race-ready aesthetic straight out of the box.

5. That Signature Inline-Four Scream

Let’s not pretend we buy exhausts just for weight savings—we want the sound! The stock ZX-6R can be a bit muted down low, but the AT2 unlocks a deep, throatier rumble at idle that quickly climbs into an intoxicating, razor-sharp howl as you twist the grip toward the 15,000 RPM redline. It sounds downright lethal on the open road without giving you a pounding headache inside your helmet.

Yoshimura AT2 Street Series 3/4 Exhaust Specs