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By using numerical control machining to achieve a large, 4mm opening for the throttle, the flow-pass area is increased by 16% and the inertial mass during the intake of air is reduced. Accordingly, peak power is increased by a factor of approximately 6 horsepower. Parts number: 16400-GE8-020 for GE8RS,GE8(L15A engine) 16400-AP1-040 for AP1-100, AP1-110, AP1-120, AP1-130, AP1-135, AP1-200 (F20C engine) 16400-AP2-020 for AP2-100, AP2-110 (F22C engine) 16400-DC5-020 for EP3, DC5 (K20A engine)

65mm diameter, With bolts. To be mounted on Spoon Sports TAIL SILENCER N1.

Please choose it for front or rear. (#45140SN0101) Front is exact same item as RIGID COLLAR 50261-BR9-000 and (#45230SN0201) Rear is excact samte item as RIGID COLLAR 50300-BR9-000

This thermo stat would open the valve in 70 degrees in order to avoid power down of the over heating. Original thermo stat would open the valve in 90 degrees. K20 engine has some problem for heating emission, this product keep the water temperature about 70-75degrees.

This product has been developed in response to considerable demand for a balance between peak power and torque. In its development, we at Spoon have implemented all possible combination's of pipe diameter, assembly rotation, and other similar factors in exhaustive engine-bench, flow-bench, and actual-driving tests. Accordingly, power and torque were successfully balanced, and by both including a bulge in the assembly-collector section and using slightly uneven lengths for pipes, it was possible to achieve our ultimate target or reduced weight. Furthermore, with any reduction in low speed torque, the discharge of gas was carried out forcibly from the exhaust port in the high speed range, and the results of this showed that it has also been possible to achieve increased replenishment efficiency for the combustion chambers. In other words, we have been successful in the development of an exhaust manifold with a real increase power. It can equip with the OEM exhaust pipe.

Please choose type the model Parts number: ALL-54102-000 5M/T Aluminum ALL-54102-001 5M/T Duracon ALL-54102-002 6M/T Aluminum ALL-54102-003 6M/T Duracon

A set of eight pieces. The actual product may vary from the one shown in the image. Please choose the model from (#50300-ZN6-000) ZN6 or (#50300-ZN8-000) ZN8