This is the 3 port .21 Off-Road Ultimate MTS Ceramic Competition Engine. Made by the prestigious Japanese O.S. Engines brand and based on their long stroke Spec II configuration, the MTS features a DLC coated crankshaft with two balanced tungsten, modified backplate, and 21J3 carburetor to improve performance. The MTS is a great choice for use in nitro 1/8 buggy and truck applications.
This engine provides amazing power and great fuel consumption.
This is the 3 port .21 Off-Road Ultimate MXS Ceramic Competition Engine. Like its predecessor M3X, the MXS is made by the prestigious Japanese O.S. Engines brand and it's based on their square stroke Speed B21 Ty Tessmann II edition engine but has some modifications on the crankshaft as well as on the back plate to improve performance. This engine has more power and returns to idle way better than its predecessor.
With this engine you will have a really good power band with a ton of usable power.
The "Team Edition" concept uses the same Ultimate engines that are for sale, but the engines are assembled directly in our factory, completely broken-in and then thoroughly checked by our competition team to extract 100% of the performance of Ultimate engines.
Once the break-in process has completed, the engines are dismantled, checked piece by piece and assembled again by our competition team, thus ensuring the highest quality of product reaches our customers.