i need a new wastegate and dont know which one to get turbonetics Evolution 35MM is the one i am looking at or should i go with the racegate 42MM http://www.turboneticsinc.com/valves_evolution.htm i want to do turbonetics because of my flang its direct bolt on makes it easy

the difference i see is horsepower the Evolution goes to 500HP where the racegate goes to 700HP my car is in the mid to low 400's in HP. The turbo i am running is a T-72 from turbonetics

Now for the ??? what is the difference between 35MM & 42MM and is there any advantage of a bigger MM

The car has a 35MM turbonetics on it