Arrow Racing De-kat Midpipes Stainless Steel for Aprilia RS V4 Tuono V4 EU 2025 (USA 2026)
SKU: MB00052-ARW-71805MI
Stainless Steel Arrow Racing Header for Aprilia RSV4 / TUONO V4 EU 2025 (USA 2026)
Product developed together with Arrow, available exclusively from us!
Track performance, Italian design.
The Arrow racing header is a AISI 304 stainless steel component developed for Aprilia RSV4 / TUONO V4 EU 2025 (USA 2026). It replaces the catalytic component, optimizing exhaust gas flow and maximizing performance.
Designed for track use only, not approved for road traffic.
Please, refer to the titanium version available here:
Arrow Racing De-kat Midpipes Titanium Steel for Aprilia RS V4 TUONO V4
Important technical note
Since the Arrow header removes both the catalytic converter (and related sensors) and the exhaust valve, using the UpMap device is essential. This prevents error messages related to the lambda sensors and the missing exhaust valve, and it restores the correct AFR (Air Fuel Ratio), ensuring engine reliability and optimal performance in a racing configuration.
You can purchase the UpMap here:
T800+ for Aprilia RS 660 E5 plus 2025 (USA version 2026)
Product advantages
- Increased power and torque thanks to catalyst removal and optimized exhaust routing.
- Racing construction in stainless steel, with precision welds and CNC joints to reduce turbulence.
- Aggressive look that enhances the bike’s sporting character.
- Full compatibility with Arrow silencers or with the original RSV4 / TUONO V4 exhausts.
- Weight saving: removing the catalyst reduces weight by approximately -2.8 kg compared to the original component.
Dimension box: 50X40X25cm, 3kg.
We ship performance motorcycle parts and accessories throughout the UK and Worldwide. Most in-stock accessories are despatched within 1–3 working days, while many performance products, including exhaust systems and made-to-order items, are typically despatched within 7 working days. During particularly busy periods, some products may take up to 14 working days to leave our warehouse.
Shipping costs are calculated automatically at checkout based on your delivery address, the size and weight of your order, and the courier selected. We work with a range of trusted delivery partners to ensure your order arrives safely and as quickly as possible.
Please note that delivery estimates are based on working days (Monday to Friday) and exclude weekends and public holidays. Some remote UK locations and international destinations may require additional transit time.
For full delivery information, shipping estimates and international delivery details, please view our complete Delivery Policy.
We want you to shop with confidence. If you change your mind, you have the legal right to cancel your online order within 14 days of receiving your goods, then a further 14 days to return them.
Items must be complete, uninstalled and in a resaleable condition, ideally with their original packaging. Unless an item is faulty or supplied incorrectly, return postage is the customer's responsibility.
Refunds are processed after inspection using your original payment method. A restocking charge may apply in certain circumstances, and we'll always advise you beforehand.
For full details, exclusions and instructions on how to exercise your right to cancel, please read our complete Returns Policy.
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