$250 to have your 6.1 intake machined back(removing the o-ring lip) for an Arrington 90mm or GM Style 90mm and portmatched to the TB.This is also an absolute MUST if you are getting a CTP Dual CAI in order to have it fit correctly.PM me for details or E-mail [email protected].
Before...... After..... Both of these have been machined back 9/16 for the CTP Dual CAI......for any other CAI the intake will be machined 1/4".