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Re: Are long tube headers on a bone stock 5.3 a waste?
Long tubes will make more power across the board over factory cast manifolds. **You must get the ECU tuned to pull all of the benefits.** A 5.3l doesn't require giant primaries either.
A good tuner will pull some great power with just the ECU tune alone, my 2500HD runs like a scalded dog with all the GM mandated neutering removed.
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1999 GMC Suburban K2500 SLT, 454/4L80E
1991 Z/28, 6.0L/T56
1949 GMC 250, S10 Frame, 6.0L/4L80E
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