RELATED MODS: Two Brothers Carbon Exhaust
Two Brothers Part Number: 005-P1 - M Series P1 Off road Race Pipe PowerTip
The P-1 tips were highly recommended to me by fellow FZ6-Forum.com members over the P1-R tip. The consensus is that the P-1 tips does a much better job at reducing the dB output than the P1-R tips.
From Two Brothers: "Our P1 PowerTipT sound suppressor is a recommended accessory for our exhaust systems with M series endcaps. A straight-through sound diffuser, the TBR PowerTipT quiets the pipe to about 2-3 dB with no significant reduction in horsepower. Not recommended for use with a spark arrestor screen. "
Here is the subtle difference between the M Series P1 Offroad Race Pipe PowerTip (LEFT) - RECOMMENDED - and the M Series P1R Road Pipe PowerTip (RIGHT) - Not Recommended

The main differences between the P1 and the P1-R tips are:
- P1 has a smaller diameter opening/nozzle than the P1-R
- P1 tip end is not tapered like the P1-R
P-1 Tips in their packaging

Two Brothers exhaust before installing P1 tips.
Simply unscrew the Torx bolts (T-20) holding on the exhaust caps. Then just place the P1 tip into the center and screw the caps back on. It's that easy! I used some Mineral Spirits on a rag to clean all around and in the grooved area before installing the tip. The tips came with O-rings, but you don't need them for these cans/setup. They include the O-rings for otter applications/mufflers as these tips are universal.


Two Brothers exhaust with P1 Tips installed. 
I did notice some noise reduction, but will need a good ride with them in to verify how well the P1 Tips work. I tried to record some MP3 sound clips and had my MP3 player recording at 5 feet away, but apparently that wasn't far enough and the sound quality was very loud and distorted. I'll try it again from further away.
- Boneman
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