No, they fit and blend right in to the plenum openings. Got a hand it to Offy for still making this stuff, I got the spacers when they were cheap on Summit but they tried to screw me over on the deal and the last supervisor I spoke with told me to pay for them and then the order can't be canceled. Got the pair for $109 now the spacers are almost $200. I will be using a pair of FST 600's on this setup.Cool! Did you have to blend the spacers to the intake plenum?