quote:Originally posted by Daniel_Jones:
If, as I suspect, your engine was tested with dyno headers and no mufflers (or efficient ones), your engine, as installed, may make less power at a lower RPM. Typical Pantera mufflers can lose 50+ HP on an engine like yours.
the car has Hall big bore headers and mufflers - do they result in the kind of hp loss you are referring to?
thanks stephen