intake
the air silencer. you can either make a wooden plug (or any material if you have the capability) or buy a 1LE elbow which is about 50 bucks. im sure there is aftermarket setups but that is all i know
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Here's a good reference, which has a section on the donkey dong
http://www.ls1lt1.com/forum/faq.php?faq=lt1faq
http://www.ls1lt1.com/forum/faq.php?faq=lt1faq






