Yoshimura R-77 Stainless Slip-On Exhaust | Suzuki GSX-R600 / GSX-R750 2011-2026 | EPA Compliant Street Legal

The Yoshimura R-77 Stainless Slip-On Exhaust is an EPA-compliant, street-legal bolt-on muffler for the 2011-2026 Suzuki GSX-R600 and GSX-R750, featuring a trapezoidal 304-L polished stainless steel canister, a straight single-core baffle with removable low-volume insert, and a riveted polished stainless end cap.

The R-77 profile is the same trapezoidal shape Yoshimura runs on its race bikes: the flat-sided sleeve packs far more sound-absorbing material around the core than a round canister of equivalent size, so the baffle can stay straight-through without the exhaust becoming unbearable on the street. On the GSX-R it delivers the deep midrange R-77 note without giving up rideability.

Because this is a slip-on rather than a full system, it installs against the stock header in minutes with no ECU remapping and no disturbance to the bike's emissions control system — Yoshimura sells it under a qualified manufacturer replacement-part declaration, which is what keeps it street legal.

• Bolt-on slip-on muffler — retains stock headers and mid-pipe
• 304-L polished stainless steel muffler sleeve and tail-pipe
• Riveted 304-L polished stainless steel end cap
• Trapezoidal muffler profile for maximized internal packing volume
• Straight, single-core baffle with removable low-volume sound insert
• MIG-welded front cap construction
• EPA compliant and street legal — no emissions system tampering required
• Yoshimura part number 960-1425 (manufacturer part 1160020520)
• Made in the USA by Yoshimura R&D of America, Chino, California

Fits the 2011-2026 Suzuki GSX-R600 and GSX-R750 as a direct bolt-on to the stock header, making it the straightforward street-legal exhaust upgrade for GSX-R riders who want the Yoshimura note and weight saving without moving to a closed-course-only full system.