X pipe H pipe or side by side

mguner said

The part that is getting lost here also is what RPM range do you use most? All these NASCAR and open header examples don't really mean squat for guys wanting street performance. Street or all out drag only it still depends on what you have. I run 452 CID through fenderwell Hooker competition series headers with 18" 3.5" collectors. Those in turn connect to 3" pipe with an X and 3" in and out flow masters that turn down at the axle. Advantage exhaust on the 1/8th mile with the exception of the fact it marginalizes my poor suspension.

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The problem is the generalizations.

Those who see no need for cross-overs are of the opinion that nothing will beat their properly tuned header extensions - and they're probably right in most cases.

Those who run them do so because they aren't able or willing to run dumped headers.

Those that claim it's ONLY snake-oil, or ONLY helps a marginal system, or ONLY exists to make things quieter aren't quite on-target because there ARE systems that will benefit even with a perfectly setup (full) exhaust system but it does also make things quieter by default.

Again, application dependent and not a drawback unless the builder is looking for maximum sound.

Someone willing to run open headers probably isn't in the market for a cross over since they're not looking for quiet :)