Are the 5.3 and 6.0 intakes the same? I am getting a 408 installed soon and need to know if I am also going to need the 6.0 intake to go along with the 6.0 heads a engine(although it will be stroked to a 408).

 

if you are building a 408 i wouldnt even think of using a stock intake on it. yes 4.8-6.0 are same intakes

 

are the volumes any different though? seems like a big spread in displacement and power output for a one-size-fits-all IM.

 

exactly the same

 

same intake. nothing is different. GM is cheap

 

I am going F/I so I hope it can take 10-15psi.

 

ported 90/90 is the way to go.

 

If your going with FI get a carb style intake with elbow.

 

I'm building a 370 FI and have been told that the stock intake would be fine. With FI the intake won't matter as much, as far as a 408???

 

seems like majority on tech wont even consider a fast 90 for boosted. they all swear by LS6 or LS2. some have lost power using a Carb'd intake. a fewtold me unless making over 1xxx hp no need for a carb'd intake. Hell Speedinc car runs LS2 intake making around 13xx to wheels, Mighty mouse running Ls6 making 1xxx to wheels

dont forget parish made 1xxx or close to i with stock truck intake