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  '64 1/2 to '73 -- The Classic Mustang
  What size headers?

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Author Topic:   What size headers?

Posts: 5
Registered: Nov 2001

posted 11-12-2001 01:36 AM     Click Here to See the Profile for 1QuikMach   Click Here to Email 1QuikMach     Edit/Delete Message   Reply w/Quote
I have 1 5/8" headers on a 351C, this seems rather restrictive for 4v heads. What size primaries would better suit the 4vs? Are 2" primaries to large? Where can I find a set with that large of a primary and won't cost a fortune? Any info is appreicated.

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Posts: 303
From: Blackburn, Victoria, Australia
Registered: Nov 2000

posted 11-12-2001 03:36 AM     Click Here to See the Profile for Clevo377   Click Here to Email Clevo377     Edit/Delete Message   Reply w/Quote
What is the RPM range your running in?


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Posts: 4618
From: Delta BC Canada
Registered: Dec 99

posted 11-13-2001 02:06 AM     Click Here to See the Profile for TomP   Click Here to Email TomP     Edit/Delete Message   Reply w/Quote
yeah there are tiny, and i bet the flange blocks part of the port too.
A 2" will work, but the pipes don't need to be that large ,a 1 7/8" would be a better choice, even 1 3/4" will be OK. As long as they fit the 4V port at the top and sides they'll be OK.

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