Our P1 PowerTip™ sound suppressor is a recommended accessory for our exhaust systems with M Series endcaps. A straight-through sound diffuser, the TBR PowerTip™ quiets the pipe to 99-102 dB with no significant reduction in horsepower. Not recommended for use with a spark arrestor screen. Easy to install - simply unbolt your existing M series endcap, drop in the P1 and reassemble.