Go5.3tt06

iTrader: (1)

Hey I need help. I think the engine is not 5.3 it's 4.8 when I bought off the craiglist from the guy it say 5.3 off the 2002 Tahoe. I'd be upset if its 4.8 I don't like 4.8. It look piston show + that mean 4.8? Anyone can help me. If it is 4.8 how I able change to 5.3 or something?

Mangled03gmc

iTrader: (95)

Pics of piston? 4.8 will have flat tops in it. 5.3 will be dished, unless it is the aluminum block 5.3, then it has flat tops like the 4.8.

Go5.3tt06

iTrader: (1)

It look like not full flat top?

Go5.3tt06

iTrader: (1)

Look closer

Mangled03gmc

iTrader: (95)

Thats a 5.3 piston

Go5.3tt06

iTrader: (1)

You sure it's 5.3? What cam and heads should I get for my 92 s10

TXSZ66AVLANCHE

iTrader: (7)

Yes that's a 5.3, its not a flat top....

Mangled03gmc

iTrader: (95)

Yes im sure

DR132

for what it's worth, if you ever do end up with a 4.8 and you want to make a 5.3 out of it all you need to do is stroke it...same bore, same block etc.

chevyboy.520

iTrader: (6)

Your going turbo, so unless your going to drop some cash on a nice set of heads. Stock heads will work. You can find a set of used PRC heads for right around 1000. Or get a set of 243's those flow well stock