I removed mine about 18 months ago, and to be honest I can't tell any difference from stock. In fact, if I ever run across it in my shop I will probably put it back
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Well according to this well researched site from a
member, (
http://jeep4.0performance.4mg.com/intake.html ) that I would not argue with, it is good for 2 hp along with the bigger airbox hole if required. Not much but it comes at no cost and every bit helps. Removing a restriction from the intake can never take away performance.
old-man, remember that no replacement intake that use cone filters or otherwise come with this venturi either. No reports have ever been shown to indicate a blow by problem from them so you can rest easy my friend.