Yoshimura AT2 Stainless Slip-On Exhaust 23-26 Kawasaki ZX-4RR

Yoshimura AT2 Stainless Slip-On Exhaust 23-26 Kawasaki ZX-4RR

The new Kawasaki ZX-4RR sport bike is one special machine. Engineers at Kawasaki set out to develop a 400cc inline four cylinder engine built for high performance, and they delivered.

For this special machine we used our AT2 muffler to develop a Street Series Works Finish slip-on giving power to the 16,000 + RPM's of the new Kawasaki powerplant. The AT2 came through in performance, sound, and weight savings. HP was bumped up by an increase of 3% and torque was bumped up as well, adding 4.3%. Our mission of adding power and torque throughout the entire spectrum was accomplished. Our AT2 Slip-on removed 4.5 pounds from the stock formation.

The sound of this inline four at 16,000 rpms with our AT2 is simply something that must be experienced in real life. True music! Finally, the styling of the AT2 can't be beat. It's now iconic matte carbon fiber end cap and heat shield compliment the lines of the ZX-4RR to perfection.

Our AT2 slip-on is proudly designed and manufactured in Chino, California.

This product was designed to fit on a standard equipped motorcycle, as delivered from the factory. OE and aftermarket accessories not found on a bike as delivered from the factory may not be compatible with this product.

Attention international customers: This product was designed and tested to be compatible with vehicles in the U.S. marketplace only. Compatibility, including fitment and performance, may vary by marketplace.

Return & Exchange Policy

If you are not completely satisfied with your purchased, you may return the item within 30 days of receipt of your item. We have no hassle return policy but some non-defective items may incurr a 15% re-stocking fee.

• Returned parts must be in new, unused, unopen and in original condition, and returned to us in the manufacturer’s original packaging with all tags included.
• Returns will be accepted if problems from manufacturer exist under one condition: the customer must provide evidence with pictures that can prove that the fault was not of their own.
• There are absolutely no returns, no exchange on electrical, special/made to order items, windscreen, body work, carbon fiber parts, closeout items or used parts.
• No return on any Ducabike, Ermax or CNC Racing products
• You are responsible for all shipping cost associated with getting your order back to us.
• Once your return is received and inspected by Motostarz, we will process your refund and a credit will be applied to your credit card or original method of payment (minus the shipping fee) within 24-48 hours. Please note that depending on your credit card company, it may take an additional 2-8 business days after your credit is applied for it to be posted to your account.

Please contact us at support@motostarz.ca or call us at 1604.370.4899 before you want to return an item. We will issue you a return authorization number that needs to be marked on the outside and inside of the package being returned.