differences btw 99 and 08 5.3's

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Feb 27, 2008 | 03:41 PM

68LS1WANNABE

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From: Poulan GA

differences btw 99 and 08 5.3's

What are the major differences between these two motors as far as power wise. Just wondering how far behind my 99 will be with all free mods, elec fans and lt's.

Feb 27, 2008 | 03:50 PM

joshua022

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From: Douglasville, GA

Are you racing someone with a 08 5.3??

The new trucks have better heads then the older trucks so that right off hand will make a difference.

Feb 27, 2008 | 07:31 PM

53bowtie

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From: Detroit, MI

i am curious about this as well. i have heard the new trucks are a little quicker than the older trucks but didnt ever hear anyone say why.

Feb 27, 2008 | 09:03 PM

Wide Open

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From: Ohio

99 5.3L = 270 hp or 285 if it is a late model
08 5.3L = 315 hp.
The NNBS trucks are a bit heavier than the NBS trucks but they have a bit more hp and torque. You are still likely a bit down on power.