We decided to flow the intake and exhaust runners of several popular factory cylinder heads and then port an intake and exhaust runner to compare the difference. We'll be performing our testing on ...

while the LS2 version is listed at 225cc. Both versions share a common exhaust-port volume of 80cc. As cast, Trick Flow's GenX heads will outflow and outperform many of the CNC-ported cylinder ...

If you've been reading GMHTP lately, you know that the new L92 heads are superior to stock LS1 and LS2 heads ... its new L92 cylinder head package. The previous Air Flow Research/SLP 225cc ...

Cylinder Head Design: the LS2 cylinder heads are almost identical ... GM claims they also offer a four percent improvement in flow. Intake Manifold and Electronic Throttle: all Gen IV engines ...