https://www.hotrod.com/articles/dyno...4Hi8YTaikM2_ug
https://st.hotrod.com/uploads/sites/...nd%7C596%3A398
https://scontent-syd2-1.xx.fbcdn.net...72&oe=5CFF5ED8
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Check the variance of them.
Check how good the std manifold isQuote:
Originally Posted by FTe217
the best.....
No surprises there. I remember reading the numbers on the holly coyote manifold. It was really bad up until redline. Pretty much useless on the street.