Arrow Stainless Steel Header Kawasaki ZX-4RR (2023-2026) 71783MI

Built exclusively for track and racing use, the Arrow 71783MI stainless steel header transforms the exhaust flow characteristics of the Kawasaki ZX-4RR, sharpening throttle response and unlocking genuine power gains across the rev range. Designed in-house by Arrow's race engineering team, this header is the essential first step toward a serious competition exhaust build on the ZX-4RR.

Key Features

• Precision-engineered stainless steel construction delivers exceptional heat resistance and long-term durability under sustained race conditions.
• Optimised primary pipe geometry improves throttle response and delivers a measurable performance increase over the stock header.
• Compatible with the standard OEM slip-on silencer, allowing a staged upgrade path without additional outlay.
• Designed to pair directly with the Arrow Slip-On silencer (71963) for a complete Arrow race exhaust system.
• Race-use only homologation — purpose-built for track days, club racing, and circuit competition.
• Custom ECU mapping is strongly recommended to extract the full performance benefit and ensure long-term reliability.

Performance on Track

The ZX-4RR is a machine built with circuit performance in mind, and the Arrow 71783MI header honours that intent. By replacing the restrictive OEM pipework with a free-flowing stainless steel header, exhaust scavenging improves materially, helping the ZX-4RR's inline-four breathe more freely at high revs. The gains in throttle pick-up are immediately noticeable from corner exit — exactly where lap times are decided.

For the best results, pair the header with the Arrow Slip-On 71963 and commission a bespoke ECU remap. The combination transforms the ZX-4RR's power delivery and gives a clear advantage in any competitive class where exhaust modifications are permitted.

Build Quality

Arrow manufactures this header in high-grade stainless steel, chosen for its resistance to the extreme thermal cycling that race use demands. Every joint, bend radius, and flange dimension is engineered to OEM-level fitment precision, so installation is straightforward and secure without modification. The finish withstands discolouration and corrosion far longer than standard mild-steel alternatives, keeping the engine bay looking as purposeful as it performs.

Fitment & Compatibility

This header is engineered specifically for the following model:

• Kawasaki ZX-4RR — model years 2023, 2024, 2025, 2026

Compatible slip-on silencer options:

• OEM standard slip-on silencer (retained from existing fitment)
• Arrow Slip-On silencer, part number 71963

Specifications