Hey gang, got a s&s 113 in a 98 fatboy, currently have vance & hines big radias. Thinking of going to a 2 into 1 pipe, thought about thunderheader, found out they are not the best choice for a engine over a 103....was told to look at the d&d boarzilla or fat cat...boarzilla is designed for a motor bigger than a 107. Has anybody had personal experience with the d&d product, or have any other ideas? thanks for the input, this forum has been very helpful.