Thread: What header primary tube dia. for 427 strokers?
View Single Post
  #3 (permalink)  
Old 08-09-2009, 02:50 PM
FUNFER2's Avatar
FUNFER2 FUNFER2 is offline
CC Member
Visit my Photo Gallery

 
Join Date: Oct 2002
Location: Eagle, Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,310
Not Ranked     
Default
1.75 is really too small. I reccomend equal length 2" down to the a 3"collector, 3.5" muffler and 3" turn out. A 4" muffler has shown a loss in HP. I gained 7 hp to over 40 over 4500 rpm with this exhaust.
__________________
Regards,
Kevin
Last edited by FUNFER2; 08-09-2009 at 02:58 PM..
Reply With Quote