I know my TTI 2" headers actually seem to have more room around the plugs with my angled plugs on my EZ heads then if they were straight plugs. I am very happy with the standard EZ heads I went with on my mild street combo. I got them from Dwayne and he just opened them up tp Max Wedge size on the intakes and cleaned them up. Course there was no Trick Flow heads when I put mine together in 2011. I don't know if the EZ heads are cheaper then the Trick Flows or if they flow as good as the Trick Flows but I believe Trick Flows are the only ones that come already CNC ported ? You can sorta tell in this pic if my plugs were straight they would be closer to the header tubes. Ron