headers vs ported manifolds

Reply Subscribe

Thread Tools

Search this Thread

Aug 6, 2011 | 10:40 PM

Snorri_B

Thread Starter

Junior User

Joined: Apr 2011

Posts: 85

Likes: 0

headers vs ported manifolds

Any ideas wish will preform better stock ported manifolds or headers on mild 400 truck engines

Aug 6, 2011 | 11:12 PM

wyoming4x4

Posting Guru

Joined: Nov 2008

Posts: 1,937

Likes: 2

From: wyoming

headers!

headers help get heat away from exhust valve which also helps with detonation prevention. Also a tube around 1.625 or 1"5/8 tube for stock heads is a good place to start on headers. If wanting torque a longer tube is a good thing. having a header that is coming straight out for acouple inches is a good thing on getting better flow. headman 89630 is a good place to check into headers for beginners. nice little header and will have to paint or get powder coated to last. stock manifolds and doing some port work is OK but anything you do to help flow is a bonus. engine is a air pump and the more efficient the air pump the better. Sanderson header makes a header also to check into.