Originally Posted by corbin09

I ran test pipes, a TopSpeed Y pipe, into a 3 inch pipe through a 3 inch hks muffler. It was loud as hell. I gained 3hp up top, but it did feel like I lost torque lower in the RPMS. I now have a Nismo exhaust with a custom X pipe and resonated TP.. to me it is the best of both worlds... The extra 3hp didnt make up for my hatch rattling from the exhaust noise.