⟲ 360° — drag meThe facts.
| Part Number | 71860PK |
|---|---|
| Fitment | KTM RC 390 (2017–2020) |
| Weight | 1.73 kg |
| Canister Length | 270 mm |
| Inlet Diameter | 54 mm |
| Outlet Diameter | 50 mm |
| Canister Material | Titanium |
| End Cap Material | Carbon fibre |
| Internal Components Material | Stainless steel |
| Road Approval | E-number homologated |
DescriptionThe whole story▼
Road-legal, lightweight and built to last, the Arrow Thunder Titanium slip-on silencer for the KTM RC 390 (2017–2020) carries a full E-number type approval so you can ride with complete confidence on public roads. At just 1.73 kg, the titanium canister sheds meaningful unsprung mass, sharpening throttle response and giving the RC 390 a more urgent, free-revving character without sacrificing compliance.
Key Features
- E-number road approval and integrated DB-killer ensure the exhaust meets legal noise limits straight out of the box — no guesswork, no risk of failing roadside checks.
- Titanium outer canister: exceptionally heat-resistant and corrosion-resistant, keeping weight to just 1.73 kg for noticeably crisper throttle response.
- Carbon end cap adds a race-bred aesthetic while contributing to the minimal overall weight.
- Stainless steel internals guarantee long-term durability and consistent flow characteristics over the life of the silencer.
- 270 mm canister length with a 50 mm outlet and 54 mm inlet — dimensions tuned for optimal flow and mid-range punch on the RC 390 platform.
- Combinable with an Arrow header to build a full Arrow exhaust system for maximum performance gains.
Certification and Road Legality
The 71860PK carries an E-number homologation, confirming it has passed the relevant European type-approval tests for road use. The factory-fitted DB-killer controls sound output to within statutory limits. This makes the Arrow Thunder the responsible choice for riders who want a performance upgrade that remains fully street-legal — no re-mapping or paperwork headaches on an MOT or TÜV inspection.
Build Quality and Materials
Arrow constructs the Thunder canister from aerospace-grade titanium, a material that tolerates sustained high exhaust temperatures without discolouring structurally or losing integrity. The natural heat tint that develops on a titanium can is a mark of quality, not a flaw. Inside, a stainless steel baffle and packing deliver consistent back-pressure characteristics throughout the silencer's service life. The carbon fibre end cap is not merely cosmetic — it resists heat conducted from the canister and is significantly lighter than an equivalent aluminium cap, keeping the rearward weight bias of the RC 390 in check.
Installation Note
The Arrow Thunder 71860PK is a slip-on silencer and requires the Arrow connecting pipe 71667MI for installation. This connecting pipe is sold separately. Once fitted with the appropriate link pipe, the combination can be further upgraded by adding an Arrow header to create a complete Arrow exhaust system.
Fitment and Compatibility
Engineered specifically for the KTM RC 390, model years 2017, 2018, 2019 and 2020. No modification to the stock header or airbox is required when using the recommended connecting pipe 71667MI.
Specifications
- Part number: 71860PK
- Fitment: KTM RC 390 (2017–2020)
- Weight: 1.73 kg
- Canister length: 270 mm
- Inlet diameter: 54 mm
- Outlet diameter: 50 mm
- Canister material: titanium
- End cap material: carbon fibre
- Internal components material: stainless steel
- Road approval: E-number homologated
- DB-killer: included (integrated)
- Connecting pipe required: Arrow 71667MI (sold separately)
FitmentWhich bikes this fits▼
- KTM RC 390 (2017–2020)
Questions, one topic at a time.
Get the real shipping cost for this item to your address — the same rates as checkout.
Choose a destination and hit Estimate — we fetch the live rates for this item.
We’re based in Germany. Standard delivery goes by DHL and national postal services and takes about 2–5 days within Germany, 1–2 weeks within the EU and 2–6 weeks outside the EU. Need it sooner? Express delivery reaches most of the world within a few days — just choose it at checkout where available.
Your exact shipping cost is calculated by destination and weight and shown at checkout before you pay — no hidden fees. Express delivery is selectable at checkout where available.
Yes, we ship to over 130 countries. Prices, taxes and delivery times for your destination are calculated automatically at checkout.
Within the EU, no — our prices already include all duties and EU VAT. For deliveries outside the EU (e.g. Switzerland, the UK or the USA), your order may be subject to import duties and taxes set by your country. These are collected by the carrier when your parcel arrives, aren’t included in our prices, and are outside our control.
As soon as your parcel ships we email you a tracking link, so you can follow it all the way to your door.
On out-of-stock items you can request a delivery time or leave your email to be notified the moment it returns — just use the notification box on the product.
You have the right to cancel within 14 days of receiving your order. Register your return by email first; once it’s approved you have a further 14 days to send the goods back. Items should be unused and in their original packaging.
Register your return by email with your order number before sending anything back, and we’ll send you the return instructions. Please note: returns that aren’t registered in advance can’t be accepted.
The quickest way is to place a new order for the size you need and register a return for the original by email — just let us know it’s an exchange.
We’re sorry — that shouldn’t happen. Contact us with your order number and a photo as soon as you can, and we’ll arrange a replacement or refund right away. Faulty goods are always covered by your statutory warranty.
Refunds go back to your original payment method, usually within 3–5 working days of your return reaching our warehouse.
PayPal, all major credit and debit cards (Visa, Mastercard, American Express), Klarna (pay later and instalments), Apple Pay, Google Pay and more — all processed securely via PayPal and Mollie.
Yes. Choose Klarna at checkout to split your purchase into flexible monthly installments.
Your payment is taken when you place your order. If you choose Klarna, you pay later according to Klarna’s terms.
Every payment runs over an SSL-encrypted connection through certified providers. We never see or store your full card details.
If your order hasn’t shipped yet, contact us as soon as possible and we’ll do our best to change or cancel it.
No — you can check out as a guest. An account simply lets you track orders and reorder faster.
For customers in the EU, prices are shown including your country’s local VAT. For customers outside the EU, prices are shown without VAT — instead, your country’s import taxes and duties may apply on delivery (see the customs question).
Yes. Your invoice is attached to your order confirmation email and is also available in your account.
Yes. We’re an authorised dealer, so every product is 100% original and comes with the full manufacturer warranty.
Yes. Everything we sell is genuine and comes with the manufacturer’s warranty, on top of your statutory rights. Keep your invoice as proof of purchase and contact us if you ever need to make a claim — we’ll help you through it.
Our team is happy to help. Use the contact button below and we’ll personally help you choose the right gear or part.
Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
Our team will personally help you choose the right gear or part — around 24h for a reply.