LS1 & Internet Acronyms - Defined
There is a risk of cracking an aftermarket lid, but a good number of people do manage to use it without problems. Smooth bellows doesn't really make any difference on performance, but people like it for appearance.
http://www.fernco.com/home.asp
https://ls1tech.com/forums/generation-iii-external-engine/440076-homemade-smooth-bellows-fernco-sizes.html
https://ls1tech.com/forums/generation-iii-external-engine/476916-quick-question-fernco-smooth-bellow.html
https://ls1tech.com/forums/appearance-detailing/480869-fernco-success.html
https://ls1tech.com/forums/generation-iii-external-engine/437008-post-pics-your-homemade-aftermarket-smooth-bellows-please.html
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