Originally Posted by Lextech Hey KAZ, The 0411 will run the stock poppets just fine! Jeff yup, I ran the 411 with the stock poppets for about 4-5 months before swapping to a MPFI intake. the 411 worked find for both
1996 c1500 gen1e 5.7L - the "LS31", 24x CNP, LS2 coils, modified T56, 12200411PCM running COS3, zz4 cam, custom MPFI, etc. coming soon: Twin Turbos
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