Which Flowmasters ??

[John Gilbert]

Oh yeah, I have Dynomax duals on my '66 C10 with a mild 327, I think they're pretty good. Never did a dyno comparo, but they seem good.

Without a dyno shootout this stuff all boils down to opinon, or back to sound.

[pockets]

This test is from 2002 and done on a mustang, but it tests quite a few different mufflers:

http://www.mustang50magazine.com/tec...o_numbers.html

For those in the magnaflow vs. flowmaster debate, the magnaflow was 3hp up on the flowmaster. The borla xs was about 4hp more than the flowmaster and the borla xr1 was less than 1hp over the flowmaster.

as for sound, the flowmaster was 2db louder than the magnaflow at 2k RPM. For those that don't know, 3db difference in sound has a perceived doubling in volume.