Quote:

Quote:

My old setup with 3" TTi and Dynomax muffs added 70 pounds and the car went the same 11.11 to 11.14 every time. So I have never run open headers again.. Too much noise for no reason!

OLD SETUP
446 with 1050 dom. and .650 comp flat tappet.
906 heads.



And none of you re-jetted for the open headers so
you gained nothing and figured it doesnt matter
EDIT
but the length of the exhaust might help in making
torque because no one puts on a collector extension
which the total collector length should be about 16"-18"




Sorry I did not spell out my complete process,
Mine was a track only car at this time,

Car had 12" turn down extentions, I also when down about 3 jet sizes if i remember right ,Was 1996 I thought it was a wash since the short times where better but lost 1 mph..