Parts/Engines & fuel/Engine parts/O.S. #11K Slide Carburetor (18TZ, 21TM)
O.S. #11K Slide Carburetor (18TZ, 21TM)
O.S.

O.S. #11K Slide Carburetor (18TZ, 21TM)

Part # OSM219820005.0(4)
Where to buy
$88.99
AMain Hobbies
Seen Oct 12, 2026
$88.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

O.S. #11K Slide Carburetor. This is the replacement for OS 18TZ and 21TM engines. Package includes one carburetor. 

Reviews5.0 · 4 reviews

Chris Iannicielloon O.S. #11K Slide Carburetor (18TZ, 21TM)

Waiting for it to be in stock,!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

5 found this helpful
Clark HudnallVerified owneron O.S. #11K Slide Carburetor (18TZ, 21TM)

Hands down the Best upgrade for any traxxas nitro engine! Makes tuning my tmaxx a breeze! Holds tunes and makes more power! No more hanging high idles and I actually spend most of my time driving instead of tuning now! I got a 11k-R on my revo aswell and I love them!

CannmeVerified owneron O.S. #11K Slide Carburetor (18TZ, 21TM)

Awesome! I cannot believe how much better my Traxxas 3.3 runs using this carburetor. Best money spent on upgrades by far! Basically tuned perfect right from the package.

Stephen HardmanVerified ownerMay 25, 2026on O.S. #11K Slide Carburetor (18TZ, 21TM)

What is going on? This your boy dre357 checking in with another...nitro video. I bought it because that guy is awesome and I wanted to be nearly as awesome and it mostly worked. It idles way...way better and snaps back to idle immediately. Good low end. It is a huge difference maker and I would say makes the carb's happy zone bigger. Sounds gross but it's true.

What reviewers say

All four reviews give the O.S. #11K Slide Carburetor five stars. Reviewers describe clearly better idle, quicker snap back to idle, and good low-end response. Several say it holds tune, makes tuning easier, and runs well on Traxxas nitro engines, including a T-Maxx and a 3.3. One review is only a stock-availability remark with no product assessment. Reviews are few and mostly enthusiastic, so the picture is limited, and no problems are reported.

  • + Much better idle
  • + Snaps back to idle quickly
  • + Good low-end response
  • + Holds tune and eases tuning
Summary generated from the reviews above.

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