New 425 question

[Marks481]

Have any taken temps on the header, or the muffler after the mods.

From Kent's post (note this is with the Robin 28FI, which reportedly runs hotter):

The Robin header and muffler more speedily remove gas and heat. The temperature at the top of the muffler is only 220 degrees, the bottom a mere 128 degrees. The middle of the flexpipe is only 130 degrees. Compare that with the 672 degree PowerTrac muffler in the same location! The tub under the muffler (which is also further away from the tire but high enough so the tip is above the bottom of the tub) is 160 degrees, down from the original 235.