ka24de/sr20det test pipe,same?

i have a ka24de currently and would like to purchase a test pipe for it,i plan to go sr20det later,will i need a new test pipe when i go sr20det or are they the same?

They are both 2.5’ cats… Are you looking to get a 3’ test pipe?

yes i am looking at getting a 3’ test pipe,also is a resistor neccesary?