Nobody, and I mean nobody, has done more LS engine intake manifold testing than Richard Holdener. You might have seen some of his videos on the subject, but know that this is a fraction of those he’s actually tested as every manufacturer you’ve heard of has sent him products to test. He’s also been instrumental in developing several intake manifolds you know and love for LS engines. In this particular video he’s running the Hi-Ram vs the Mid-Rise from Holley EFI and going comparing both of those to the factory LS Truck intake manifold as well. Any guesses on how they stack up on these two test engines?

Here is the video description:

MID RISE VS HIGH RAM LS INTAKE TEST-HOW DO THEY RATE? WHICH INTAKE SHOULD YOU CHOOSE FOR YOUR PERFORMANCE LS MOTOR? CHECK OUT THE RESULTS OF THIS SHOOTOUT BETWEEN THE CHEAP, STOCK (EARLY) LS TRUCK INTAKE AND THE HOLLEY MID RISE AND HI RAM INTAKES ON BOTH A MODIFIED 6.0L AND A 383 SROKER. IS THE TUNNEL RAM-STYLE HI RAM THE ULTIMATE LS INTAKE, OR IS THE MID RISE THE BEST ALL-AROUND CHOICE? HOW WELL DOES THE DUO COMPARE TO THE FACTORY TRUCK INTAKE? THE BEST WAY TO FIND OUT IS TO RUN THEM BACK TO BACK ON TWO DIFFERENT TEST MOTORS!