OS MAX B21 Nitro Off-Road Engine as T2090SC Combo
Description
OS MAX B21 Nitro Off-Road Engine as T2090SC Combo
The OS MAX B21 nitro off-road engine is a real highlight for demanding RC fans who value high-quality engineering and durable performance. This engine was added to the range as an exclusive combo edition at specific customer request — and with good reason: based on the proven O.S.SPEED B2104, the MAX B21 combines the highest reliability with excellent driveability. Perfectly matched with the TB02 (T-2089) exhaust system and the MB01-75 mm manifold, it delivers sharp performance that impresses off-road and on tarmac alike.
Key features
- Powerful combo including exhaust system: With the MB01 manifold and the EFRA2089 TB02 pipe you get a setup that is ready to run — ideal for newcomers and value-conscious racers.
- Optimal performance off-road & on tarmac: Strong but balanced power delivery makes the MAX B21 a flexible all-rounder — from the race track to a test run in the rough.
- Easy to handle: Despite its strong performance, this engine is particularly user-friendly and also well suited to drivers with less experience.
- Colour-coded venturis included: The supplied 6.0 mm and 7.0 mm venturi inserts (anodised orange & yellow) allow quick adaptation of performance to track conditions and driving style.
- Durable & reliable: With rugged construction, a P3 glow plug and high-quality components, this engine brings not only power but also stamina.
Who is this engine for?
The OS MAX B21 nitro off-road engine is aimed at hobby drivers, ambitious RC enthusiasts and racers looking for a powerful engine for their 1:8 RC vehicle. It is also an ideal gift for technically minded RC fans.
Technical data
- Displacement: 3.49 cc
- Bore: 16.27 mm
- Stroke: 16.8 mm
- Rev range: 4,000–41,000 rpm
- Maximum power: 2.60 hp at 34,000 rpm
- Weight: 361 g
- Glow plug: P3 Turbo
- Included: 6.0 mm & 7.0 mm venturi (anodised), exhaust seal, manifold springs, dust cap set (3mm, 16mm, 18mm)
- Exhaust system: EFRA2089 TB02 + MB01-75 mm manifold
With the OS MAX B21 T2090SC combo you get proven racing engineering in a well-considered all-in-one solution. Perfectly matched, easy to use and strong on performance — this nitro engine brings genuine racing feel to your RC experience.
Secure this powerful all-round combo now and get going — on any terrain.
Disposal of old batteries
Disposal of old batteries
Battery withdrawal - information according to the battery network
Since batteries and batteries can be included in our programs, we are obliged to point out the following according to the battery law (BATTG): Batteries and batteries must not be disposed of in household waste. They are legally obliged to return used batteries and batteries so that professional disposal can be guaranteed. Old batteries can contain pollutants that can damage the environment or health if not properly stored or disposal. Batteries also contain important raw materials such as iron, zinc, manganese or nickel and can be used.
Old batteries and batteries can be handed over at the public collection points of the municipality free of charge and wherever batteries and batteries are sold in the relevant type.
Pollutant batteries or batteries are marked with the following symbols in order to refer to the household waste disposal ban. The chemical symbol for the heavy metal is given under the sign:

The sign with the rubbed garbage can means that you are not allowed to dispose of batteries and batteries in household waste. Under this character you will find additional symbols with the following meaning:
- PB: Battery contains lead
- CD: Battery contains cadmium
- Hg: Battery contains mercury
Rückgabe & Garantie
Rückgabe & Garantie
✅ 14 Tage Widerrufsrecht ohne Angabe von Gründen
📦 Rückversand:
• Rückversandkosten trägt der Kunde
• Originalverpackung wird empfohlen
🔍 Zustand:
• Artikel muss unbenutzt und unbeschädigt sein
• Alle Originalteile und Verpackungen müssen enthalten sein
💰 Rückerstattung:
• Kaufpreis wird nach Prüfung vollständig erstattet
• Bearbeitung innerhalb von 7 Werktagen
📋 Bei Defekten:
• Kostenloser Umtausch oder Reparatur
• Rückversand auf unsere Kosten
Product information
Product information
The Product Safety Ordinance (GPSR) ensures that only safe products are launched on the market that neither endanger health nor the security of consumers. With compliance with the GPSR, we actively contribute to product safety and consumer protection as a company headquarters in Germany.
Listed below you will find all relevant information:
1. Manufacturer name: O.S. Engines Co., LTD
6-15, 3-chome Imagawa Higashisumiyoshi-Ku
Osaka 546-0003, Japan
E-mail: e-info@os-engines.co.jp
2. Sales partner: Minicar's hobby distribution
Annelundsgatan 17c
749 40 Enköping, Sweden
E-mail: Info@minicars.se
The combustion engines and corresponding accessories from O.S. Engines Co., LTD for remote -controlled cars are no toy! Recommended from the age of 14. Use only under the immediate supervision of adults. Please note the information on the disposal of old batteries: https://www.rmv-deutschland.de/hinweis-nach-batteriengesetz
After delivery, our items are professionally positioned in our warehouse and provided with a permanent storage space. During the entire storage period, we ensure that all conditions are observed to preserve product quality and security. When transported, we also attach great importance to safety: all goods are carefully packed to protect them from damage and hand over to our customers ready for dispatch. In addition, warnings, symbols or other safety -relevant information are published directly in the product image. If this is not possible, we provide this information under the additional point "Download" as supplementary PDF documents.
As long as the products are in our responsibility, we make sure that neither the storage nor the transport conditions affect conformity with the general security requirement. It is our aim to ensure that our products do not develop new risks for consumers by handling and storing.