Arrow Pro-Race Slip-On Silencer Stainless Steel Yamaha YZF-R3 (2015-2018) 71831PRI

Engineered from aircraft-grade stainless steel throughout — body, end cap, and internals alike — the Arrow Pro-Race 71831PRI is the definitive slip-on upgrade for Yamaha YZF-R3 riders who refuse to compromise on material quality. At just 1.12 kg, it sheds meaningful mass over the stock silencer and rewards you with sharper throttle response and a more agile feel the moment you leave the pit lane or the morning commute.

Key Features

• Full stainless steel construction — silencer body, end cap, and internal components — delivers exceptional heat resistance and long-term durability in all conditions.
• Weighs only 1.12 kg, reducing unsprung and overall mass for noticeably improved throttle response and handling agility.
• Homologated with an E-number, making it fully road-legal straight from the box with no paperwork headaches.
• Includes a removable dB killer for compliant noise levels on public roads, with the option to run louder on track days.
• 68 mm outlet diameter and 45 mm inlet diameter are precisely calibrated to maximise exhaust flow for the YZF-R3's parallel-twin engine.
• 250 mm silencer length optimised for consistent power delivery across the rev range without compromising ground clearance.

Build Quality and Materials

Arrow's Pro-Race line is built to a standard that justifies its track-bred name. Every component — from the 45 mm inlet collar to the 68 mm stainless outlet end cap — is fabricated in stainless steel rather than the aluminium or carbon used on higher-priced siblings. This makes the 71831PRI particularly well-suited to year-round road use, where exposure to road salt, rain, and heat cycling would degrade lesser materials. The stainless internals resist corrosion and maintain consistent acoustic and performance characteristics over the life of the silencer.

Performance and Throttle Response

The Pro-Race's reduced mass translates directly into a more responsive ride. Compared to the heavy OEM can, the 1.12 kg Arrow unit lowers the centre of gravity contribution at the rear of the machine and reduces rotational inertia. Combined with the optimised inlet and outlet diameters, exhaust gas evacuation is significantly improved. Arrow recommends pairing the 71831PRI with a dedicated ECU mapping for the YZF-R3 to fully exploit the improved exhaust flow — throttle response and mid-range pull both benefit noticeably when the fuelling is recalibrated to match.

Road and Track Use

The E-number homologation means the 71831PRI passes registration inspections across Europe without modification. The supplied dB killer brings sound levels within legal limits for daily riding. Remove it for track days and the Pro-Race character of the silencer comes fully alive. The 250 mm body length keeps the silencer tucked neatly within the YZF-R3's fairing line, preserving ground clearance on aggressive cornering lines.

Fitment and Compatibility

This silencer is a direct slip-on replacement designed specifically for the following:

• Yamaha YZF-R3 — 2015, 2016, 2017, 2018

No modifications to the header or mounting points are required. Always verify your model year and variant before ordering.

Specifications