Established in 2000, Chengdu Hurricane Speed & Performance Auto Parts Co., Ltd. have grown to be a professional enterprise in performance auto parts. We believe that focus on the quality and customer needs can be successful. Now our main products: connecting rod, has grown to be a professional product. All Hurricane connecting rods are Computer Controlled Numeric(CNC) machined and shot peened, material:4340 steel, 40CrNiMo(US) or EN24(EU) 1.Smooth finish of BE BORE surface .it`s precision is within 0.01mm after honing. It is even used to be your mirror. 2.Big end surface effect. the surface is very smooth , the R part is mellow and full.It is hard to see the tool vestige. 3.shot-peening effect. we are strict to select steel shot. We only use the cleanest shot which has the most suitable size. The result is our rods`surface is very bright and smooth.   4.Bolt seat.you can see the roof `s arch is mellow and full. Only CNC can reach this degree.  5. The bolt hole and thread are made by CNC and Precise cutting-tool.You can't find any tool vestige even on the bolt hole surface. 6.Big end arch part surface is also very smoot h and we make the shoulder into arc shaped. 7.H â??beam effect. as a result of twice maching by CNC, it is very smooth. Next picture may help you get a close impression of the H-beam. 8.Pin end arch part surface is very smooth, it is hard to see the tool vestige. 9.Cooper bush of the pin end. It is smooth and beautiful. 10.generally,2.5mm-3mm diameter oil hole on the pin end.