usually when a nitro cuts out on full throttle its because its too lean and starving for fuel. You only make adjustments in 1/8 incriments at a time and run it for like 20 seconds to let the settings start to work. Richen the mixture 1/8 turn counter clocwise at a time until it runs good then richen an 1/8 from this setting.

Wow. I feel prety stupid.While trying to tune my engine today i noticed bubbles around the exhaust manifold. Checked he screws and sure enough they were loose. Got it to run although not that well. Then I noticed that there was a section of gasket missing. Wait it only gets beter. I removed the muffler only to find the coupling torn and the tip where the exhaust is held was also broken. So I am going to be getting the parts I can locally and will be looking for others elsewhere. Thanks for your patience this far.

Which side pipes will fit with the hpi header?

get an associated rpm pipe, there less than $20 and work good