Looking flr a difinitive answer from somebody who has heard both the SPI and HMF Swamp series (NOT the xl). Which is quieter. Yes I saw the thread where the spi was actually metered within the common 96db rule.

I have a yoshi slip on which is terribly not trail friendly…even after i modofied the quiet core a bit my XMR 1000 still sounds like an sk modofied barreling through the woods.

Threw the stock exhaust on and well, i thought my seat and rear fender were going to melt, even with my header wrapped and tuner on it. So i need something with better flow without the sonic boom of the yoshi, and still be under 96db at cruising speed. All my research says spi or swamp series.

Looking flr a difinitive answer from somebody who has heard both the SPI and HMF Swamp series (NOT the xl). Which is quieter. Yes I saw the thread where the spi was actually metered within the common 96db rule.

I have a yoshi slip on which is terribly not trail friendly…even after i modofied the quiet core a bit my XMR 1000 still sounds like an sk modofied barreling through the woods.

Threw the stock exhaust on and well, i thought my seat and rear fender were going to melt, even with my header wrapped and tuner on it. So i need something with better flow without the sonic boom of the yoshi, and still be under 96db at cruising speed. All my research says spi or swamp series.