SLP Smooth Bellow
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That being said, you're not going to notice any gains from it with the naked eye (or butt). But I do chalk it up as one of those things that never hurts. The Fernco 3x3 works just fine. Pick one up at Home Depot for $6, stick it in some boiling water for about 10 minutes, and trip to fit over the MAF. Good to go.
Sure, you could concoct a Home Depot solution that will smooth out airflow, but it's not going to look very good or have a factory-fit like the SLP bellow, plus you won't enjoy seeing it, in-your-face, near your expensive heads or fancy lid. So to me the SLP bellow was worth it.



and a waste of cash, IMO






