Each system is hand-crafted for a perfect fit, right out of the box and includes provisions for attaching the OE oxygen sensor with ease. El Diablo 4" 2-into-1 Full Exhaust System. Harley Davidson XL50 50th Anniversary Sportster 2007.
It hits the stock brake lever bracket pretty bad and for the models from 03 to 06 you have to find the o2 sensor bung plugs from a local parts store and for the price of this exhaust it should most definitely come with them.