Quote Originally Posted by EUR003act View Post
if you dont want to fork out the money for a P309, keep your P305 and once you have modded RBC by me and J32A3 TB, youll be able to use that spacer no problems! (my modded RBC has the idlebypass welded shut)

i've got the P309R but when i put it on it leaks cause it doesnt suit the stock TB and IM cause of the gap. If i had the Civic Si one it would work properly, cause the gap would follow through and TB end would block it.