I currently have the crawford plenum with my turbonetics kit. If I swap out the crawford and swithch to OEM plenum with 5/16 spacer will my car need to be retuned? the car was tuned with utec. The only reason I'am considering doing this is because my carbon fiber hood does not close with the Crawford plenum.

 

probably not, but i would anyways

 

it should be close, and if you have a wideband gauge you can verify the tune yourself.

 

I doubt there would be much difference. If anything maybe a little richer because it may not flow as much as the CP.