Python Cone Insert. 1.75''
The performance characteristic of the engine can be affected by the use of collector cone inserts in addition with the python exhaust system. The large 21/2'' flange diameter can be reduced to down to 1-1/2'' by using one of these cone inserts. As a result the higher gas acceleration can affect the lower rpm range. As result it is possible that you feel a noticeable torque increase in lower and middle rpm ranges, which is more preferred for daily street driving.