Wades SnS

iTrader: (2)

I am thinking about buying a set of 5.3l heads and I have a set of 2.20 and 1.60 valves to put in them. Will they fit without touching one another or replacing the seats? What do stock 5.3 heads flow like compared to other heads, considering the ports sizes are all comparable to the ls1's. I know that they won't flow as well do to valve size but lets say they have the same sive valves just smaller chamebers what flow are we looking at now. Anyone have any idea what cfm's.

Thanks,
..RJ..

Wades SnS

iTrader: (2)

does anyone have any answers or advice?

TVWilkes

You will have to replace the exhaust seats.A ported 5.3 head with 2.02/1.6 valves will flow around 300 on the intake,225 on the exhaust.