Yes this is the one for the t maxx. The header spring broke in the first 5 minutes of running so I had to modify it to be held on with screws. After break in I'm trying to tune it and utterly failing for no apparent reason (running way lean at the break in needle settings) when I notice that the header to muffler springs are very loose and the gasket is leaking. I take the springs off and the gasket is falling apart, I'm guessing either from fuel or WD-40.
So all in all after about 6 tanks all of the hardware and gaskets are completely worn out. I wasted $50 on this POS. Go THS.