Jeep exhaust Manifolds instead of headers, are these the large opening manifolds?

roadrunninMark said

Sounds like I will just get a set of long tube headers then. For a street car, I want the low end power and don't need the high end.

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Just depends on what you are willing to deal with. Everything has tradeoffs. Long tubes can be a huge pita. For a street car I strongly recommend these:

Summit Racing SUM-672330 Summit Racing™ Ball Flange Kits | Summit Racing

Also I only use Percy's seal 4 good gaskets. However it appears patriot now owns these. Anyhow I swear by these.

CHRYSLER Patriot Exhaust 66037 Patriot Seal-4-Good Header Gaskets | Summit Racing