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Gen IV 5.3l head question?

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Old 08-30-2010, 04:11 PM
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I have installed a 2007 5.3l GenIV engine and trans into my 1993 Chevy Z71. i have installed a mild cam, headers and cold air intake. The truck has great power, but I am looking for more. My question is has anybody had any experience with head modification, such as cnc work on factory heads or aftermarket heads. I think this is the next step in a great hp upgrade without supercharger, turbo, nitrous. Please if you have any recommendations, let me know?

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Old 08-30-2010, 04:30 PM
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Heads are a good upgrade. Look to our sponsors over here =========>>>>>

You want 243/799 heads, otherwise known as LS6 heads.
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Old 08-30-2010, 04:38 PM
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Given the year of the motor he allready has LS6 heads
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Old 08-31-2010, 05:42 AM
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yep the Gen IV already has the 799/243 heads. just buy a set of PRC 2.5 5.3 heads or even some Trickflows. you gotta ask yourself whats too much money, then stick to it.
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Old 08-31-2010, 06:42 AM
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Originally Posted by BlackGMC View Post
Given the year of the motor he allready has LS6 heads
Which is why I suggested he start looking at those ported versions from our sponsors....
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Old 09-09-2010, 08:33 PM
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is an 06 5.3 n 07 5.3 the same?
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Old 09-09-2010, 09:17 PM
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Originally Posted by 06murder View Post
is an 06 5.3 n 07 5.3 the same?
nope...
a 06 will probably have 862 heads, 78mm intake, and dished pistons..
07 will have a 90mm intake, 243 or LS6 heads, and flat top pistons..
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Old 09-09-2010, 09:25 PM
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oh well i out ran one the other night..
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Old 09-13-2010, 08:22 PM
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wait, a trickflow has a 2.04 intake valve, they fit in the 5.3 bore?

can you even fit a 2.02 in it?
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Old 11-15-2010, 10:53 PM
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how about the 4.8L heads?
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