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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 EditionFeatures:
.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
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4.1 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Fun toy
Color: Orange
My standard poodle loves this toy. It holds a charge for several hours and is well made
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
★★★★★ 5
Colorful, Sturdy & Great Value
Color: Large Set of 4
Purchased for our two puppies when they were 2 months old and weighed about 14 pounds so theses balls were a little big for them to hold in their mouths but that didn't stop them from trying. While they did like these balls they much preferred softer soccer balls, the later of which did not hold up well at all. I had hoped they would play with these balls more when they were older but that hasn't happened 5 months later. I guess it's no fun if you can't tear the toy apart. Colors are very bright and they do enjoy chasing after them as long as I am the one rolling them across the room for them. Maybe when they progress to batting things with their paws they will start to do this for themselves.
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Reviewed in the United States on May 18, 2025
★★★★★ 5
My pup loves them
Color: Large Set of 4
Colors are bright and my dog loves the squeaky! Good size no worries of choking.
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Reviewed in the United States on September 10, 2025
★★★★★ 5
amazing
Color: Large Set of 4
good buy worked well
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Reviewed in the United States on April 13, 2026
★★★★★ 4
3.5, Not 3.0
Color: Medium Set of 6
These balls were almost exactly what I needed. I was replacing my boy’s favorite ball, which is the 3” squeaky, spikey ball that fits in the chuck it launcher. Unfortunately I saw the shiny object next to it and because there were SIX balls and a dollar less, I failed to see that these are 3.5” balls instead of 3”…. Great balls but no fitty in the slingy. Buyer beware. No chuck it no problem. Save a buck.
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Reviewed in the United States on March 9, 2026
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