Thanks for the info. Just to clarify, would you say using a 1" open spacer with the 4.1 intake would make the performance of the 4.1 intake better? (Is the 4.1 intake considered dual plane?)
Also, did you have any trouble with knocking on the edel intake with the egr removed?
I'm a points member at Lebanon Valley Dragway, VK. The track is about halfway between Albany and Pittsfield, Mass on US 20. I know your area as my job takes me to Catskill a few times a year. Yeah, keep the 3.42's since it's your driver. GB