i currently have a Greddy SP catback. i want to change my muffler to the ITR. i just need something that is quiet and has good flow numbers.

i need to know if this is require welding? or if i can just take the last portion of the greddy muffler and pipe off, and bolt on the ITR.

i was also concerned about the bends of the pipe because i have a sedan, and that might differ in the way the exhaust pipe has to bend.

thanks for the input.