421EXHAUST MANIFOLD

It is a product to determine the balance between peak power and torque.in the spoon, there are countless combinations such as tube diameter and collective rotation, etc. in a countless combination, repeated engine benches, flovens, and actual running tests to balance power and torque and lighten the weight, and put bulldge on the collective collector.i achieved it by making the tube length a little inequed.the low -speed torque is forced to absorb the exhaust port from the exhaust port in the high rotation range, and as a result, the effect of increasing the filling efficiency of the combustion chamber.in other words, we have developed an exhaust system that really powered up.