SKU: 83903189126

OS Speed B21 3.49cc Off-road Racing Engine Exhaust Pipe Set

Sale price$333.00 Regular price$370.00
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Description

OS Speed B21 3.49cc Off-road Racing Engine Exhaust Pipe SetOS Speed B21 Level 21 3. 49cc Off road Racing Engine Exhaust Pipe Set ADAM DRAKE Edition Features: . Description: Adam Drake is a world class professional racing driver at the ROAR national championship, one of the best cross country RACES in the United States. At the age of eight, he started playing RC suvs in the backyard, and at 14, he started racing cars in earnest. He won the 1 8 ROAR Nitro suv title in 2013 and has five ROAR titles to date. Many

OS Speed B21 Level 21 3.49cc Off-road Racing Engine Exhaust Pipe Set - ADAM DRAKE Edition

Features:


.Description: Adam Drake is a world-class professional racing driver at the ROAR national championship, one of the best cross-country RACES in the United States. At the age of eight, he started playing RC suvs in the backyard, and at 14, he started racing cars in earnest. He won the 1/8 ROAR Nitro suv title in 2013 and has five ROAR titles to date. Many of his followers around the world supported him on Facebook and Twitter. The o.s. simed B21 ADAM DRAKE Edition, based on his recommendation, redesigned the crankshaft with a stroke change to 16.55mm based on the o.s.simed B2101. Two tungsten hammer specifications have been changed to improve the driving feel. By adjusting the timing of the newly designed cylinder jacket, the special φ6.5 anodized carburetor reducer for off-road racing and the special φ8 anodized carburetor reducer for off-road racing were installed, and the engine was completed to win the large race that met his requirements. An exhaust system with a t-2090sc tuned silencer and an M2004SC (85mm) manifold are also provided
.Features:Designed according to Adam Drake's advice and taste.The engine can be used in both buggy and truck. New design cylinder liner with new porting.New design DLC crankshaft with double tungsten counter weight.New bore x stroke(16.40x16.55mm).carburetor reducers are 6.5mm and 8.0mm.ceramic rear bearing.21J carburetor, the same as OS SPEED spec 2 and spec 3.OS SPEED P3 GOLD plug for better fuel mileage
.Specifications: Displacement: 0.213 cu in (3.49 cc); Bore x Stroke(16.40mm x 16.55mm); Practical rpm: 4,000-42,000rpm; Power Output: 2.65 ps/2.61 hp/34,000rpm; Weight: 353g/12.45oz
.Safety Instruction: The engine is not a toy! Please read the instruction manual to become familiar with the features of the product before operating. Keep yourself and those around you safe. To maintain the best engine performance and longer service life. Incorrect or faulty maintenance can result in damage to the product.
.For Ages: 14+

Specifications:

.Color: As Shown
.Material: Metal
.Product Weight: 353g
.Package Dimensions: 18 x 12 x 10cm
.Package Weight: 500g
.Packing: Box

Package Content:

.1 x Engine + Exhaust Pipe Set
Shipping Notes
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Exchange/Return Notes
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SKU: 83903189126

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Thomas M. Cook
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★★★★★ 5
As described, great quality
Perfect fit and function for 2018 Subaru Outback
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Reviewed in the United States on January 15, 2026
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Michael Mueller
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★★★★★ 4
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Reviewed in the United States on December 18, 2025
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Create58
Los Angeles, US
★★★★★ 5
Fits great
Excellent value for the money and fits great. Does exactly what you need it to.
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Reviewed in the United States on February 17, 2026
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Carlos J. Caballero
Lake Worth, US
★★★★★ 5
buen articulo funciona perfecto.
buen articulo funciona perfecto.
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Reviewed in the United States on May 14, 2026
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Dustin B
San Leandro, US
★★★★★ 5
Fits 2010 Subaru Forester with 2.5 non-turbo
Definitely looks and feels like a better than OEM air filter. Not sure of any other benefits.
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Reviewed in the United States on May 25, 2026

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