Stealth Head Mod // 2018-2024 ZR / RIOT / XF / M 8000 / 800 C-TEC2 / Yamaha Mountain Max 800

Speedwerx Stealth Head Mod

Our Stealth Head Mod with billet dome inserts is going to be the key to unlocking maximum power and performance from the 800 C-TEC2! The head design adds power while reducing knock readings detected by the stock sensor with a compression ratio similar to stock- we are seeing a 4-6 hp gain in mid-range RPMs on premium pump gas and low elevation applications do not need a fuel controller with the stock pipe. At higher elevations, we expect gains to be in the 6-10 hp range depending on the elevation and compression ratio, however a fuel controller is needed to run the higher compression ratios. We highly recommend the purchase of our Exterminator Kits, as they are developed and tuned with the Stealth Head as part of a complete performance package.

What we do is machine / gut your stock head so that you can run our interchangeable billet domes. These domes drop right into place under the modified stock head cover without anyone even knowing it! Not only does this add some serious power to your machine, but it is a cheaper alternative to a complete billet head kit set-up. Kit requires modification to the stock head, and purchase of two billet domes and o-rings for the top of the domes. Inner and Outer O-Rings for the Cylinder to Head are available separately as well- see related items below.

Note: Base price is with exchange of your stock head!

Core Options:

1. Send us your stock head core and we will send you the Stealth Head once we receive it.

2. Purchase the Stealth Head outright and we will send it out right away. You can keep your stock head, or ship it to us and we will credit you back when we receive it!