Ok guys I know that this subject has been discussed before but Im just wondering I already have a Stillen Hi flow Intake (soon to have place racing cold air intake piping) Hot Shot racing Header, Random Technology Cat Converter, Unorthodox Underdrive crank pulley, NGK ignition wires and NGK spark plugs, JWT cams are going in probably next week. The last part of opening the breathing of my engine is the exhaust. I only have a free flow muffler currently. I have already placed an order for the Greddy SP catback exhaust. I hear everywhere that the SP exhaust fits both the Sentra SE-R and the 1.6 Liter. Would this be a good exhaust? Why is it some people say yes it will fit and some people say no it will not. If the piping is 2.0 inches why is it that everyone says greddy will not fit? Shouldnt 2.0 Inches for piping be perfect for the B13 Sentra 1.6 Liter? After all it does say at their website SE/SE-R meaning both.