Did these pipes for Chris "Limey" .. They are 1.75" O.D so I had my machinist (Tyler) machine some new exhaust flanges for it out of 1/2'" stainless and I pieced the pipes together. The cone came from Apollo Cones, top notch and American made check him out at http://www.apollocones.com/products.html You can also see more of this bike as it gets finished up at http://www.limeybikes.com/services.html. Enjoy!!!