Aftermarket FXR frames often do not use the oem steel pivot, so it is up to the customer to adapt the pieces we provide for their particular application. A tubular support bar bolts directly to the chassis. This support bar in turn has two bolt brackets which attach the front and rear pipes. Two bolt tabs attach front and rear pipes to this tubular support. Front pipe mounts to a special plate that is bolted to the transmission.
Rear pipe is attached to the front pipe with a tubular support that runs underneath the front pipe.
Front and rear pipes are locked together with double bolted brackets. The rear pipe bolts to the factory support bracket with a tab supplied by RB Racing. We've tried everything you can think of and these are the best finishes. These are the best production castings going with their raised inlet and exhaust ports. Oh, you can fool around with the usual porting bullshit, but you'll end up where these castings start out in terms of cfm.