Originally Posted by Alps Pacino
Inside diameter is just under 3 1/2 inches i would say 3 1/3 but closer to 3 1/2 than 3"
How is it fitted at the front cos a 3/ 1/2 wont bolt up it needs a reducer pipe. Only one company I connected could actually produce a 3 1/2 system & even they had to buy the bends in. Biggest Mongoose is a 3" can i suggest you are measuring the tail pipe, which on mine is 4" the rest is 3".
Rod