This exhaust manifold does not sacrifice the torque characteristics at low to mid speed range. The layout is the same 4-2-1 type as the factory manifold. HKS' exhaust manifold is twisted at 2 to extend the pipe length allowing the torque improvement at mid speed range Knocking is also reduced, increasing ignition timing and air-fuel ratio for further performance and stability. Weight is 5kg less than the stock exhaust manifold.