243 heads are they the same all years?
243 heads are they the same all years? Hey guys are 243 heads, are they the same on all years...The reason I ask is because my 08 Avalanche has them on a 5.3 engine, are they the same? thanks.
Last edited by jman54002; Sep 26, 2010 at 08:07 AM.
no i saw a post from some1 saying if there a V mark above one of the exhaust ports its the better "revised" casting. being a 08 you should be well within this margin.
while you don't have the lighter valves they don't make much difference on a stock 5.3 or LS1 setup. but can be easily installed
while you don't have the lighter valves they don't make much difference on a stock 5.3 or LS1 setup. but can be easily installed
no i saw a post from some1 saying if there a V mark above one of the exhaust ports its the better "revised" casting. being a 08 you should be well within this margin.
while you don't have the lighter valves they don't make much difference on a stock 5.3 or LS1 setup. but can be easily installed
while you don't have the lighter valves they don't make much difference on a stock 5.3 or LS1 setup. but can be easily installed
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i might have said this wrong i was specifically talking about the lighter weight valves not the heads.
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They say the ones w/ the triangle under the spark plug hole are good for 6-10 hp more because they are semi-permament mold casting but i have seen that same triangle on 241's also.
