which size headers for 454?
#1
03-22-2010, 10:57 PM
which size headers for 454?
My 454 will have a pretty good cam, Comp XE274, along with around 10:1 cr with around 510hp. should I get the 1 3/4", 1 7/8" or 2" primary headers?
#2
03-22-2010, 11:06 PM
Join Date: Aug 2008
Location: Portland, Or
Posts: 9,097
I'd go with the 1.75" primaries. They'll be planty, and give you better clearances. The big primary tubes can get pretty darn tight when they all come together on the way to the collector, which often results in binding at the steering column, or hitting the starter, crossmember, etc.
#3
03-23-2010, 01:14 AM
I'd go with the 1.75" primaries. They'll be planty, and give you better clearances. The big primary tubes can get pretty darn tight when they all come together on the way to the collector, which often results in binding at the steering column, or hitting the starter, crossmember, etc.
what size are yours Vall?also do you think I should stick with my 2.5" exhaust pipes or go with 3"?
Last edited by jason7504; 03-23-2010 at 01:22 AM.
#5
03-23-2010, 04:12 PM
Join Date: Aug 2008
Location: Portland, Or
Posts: 9,097
Been so long since I bought mine I had to go get the calipers and measure them! They're 1.75" diameter, and 2.5" exhaust all the way back.
#6
03-23-2010, 06:07 PM
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Join Date: Oct 2009
Location: Raised in Tilton NH now residing in Kings Mountain KY
Posts: 496
If you decide to go larger I can tell you these worked well for me with no clearance issues. Noticed under the applications tab that these do not work with stock a/c or manual shift on column.
http://www.summitracing.com/parts/HE...n/?prefilter=1
http://www.summitracing.com/parts/HE...n/?prefilter=1
Last edited by Pablo63; 03-23-2010 at 06:14 PM.
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