Everyone is always asking which LS heads are best and on the hunt for 243s all the time. But Richard Holdener, and several others, have done all the testing to see if there is much difference and if that difference actually matters at the power level most folks are at. So to show just how versatile they are, Richard is putting the 317 head to the test in a couple of different combinations to show that the flow is not the limiting factor for horsepower because they flow plenty. Watch the video and let us know what you think.

Video Description:

WHAT IS THE MAX POWER I CAN MAKE WITH 317 LS HEADS? HOW WELL DO 317 HEADS WORK ON A 5.3L? SHOULD I SWAP TO 317 HEADS ON MY 4.8L, 5.3L OR 6.0L? HOW WELL TO PORTED 317 HEADS WORK? ARE 317 HEADS A GOOD CHOICE FOR A TURBO LS? ARE 317 HEADS MORE PUMP-GAS FRIENDLY? IS LOWER COMPRESSION BETTER FOR BOOST? CHECK OUT THIS VIDEO WHERE I COVER THREE DIFFERENT TURBO LS COMBINATIONS RUNNING 317 HEADS. THE FIRST TWO INCLUDED A CAMMED 5.3L AND 6.2L, EACH EQUIPPED WITH A SINGLE TURBO MAKING LOW BOOST. THE THRID COMBINATION WAS THE HIGH-HORSEPOWER 6.0L, EXCEEDING 1450 HP AT 28 PSI. THE 317 HEADS CAN MAKE BIG POWER, BUT WHAT IS THE POWER LIMIT?