Cummins Competition T4 and T6 manifolds

We have finished our first production run of our billet center section T4 and T6 exhaust manifolds. Available in 12v and 24v port design. These are a straight flange designed for increased flow and faster spool up. We have been testing these for several years now on a variety of trucks (and pulling tractors) with great results. They come Ceramic coated and include the studs and nuts to mount the manifold to the head.

Do you offer anything with a Divided Gate port??

Dom_c13b said:

Do you offer anything with a Divided Gate port??

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Sorry we do not.

Happen to have any flow numbers and/ or comparisons to a Steed Speed T4 or factory center port manifold?

RD TRCTR said:

Happen to have any flow numbers and/ or comparisons to a Steed Speed T4 or factory center port manifold?

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I don't have flow numbers to compare against Steed, but on one of our test trucks that was running a T4 Stainless manifold we saw a big increase in low rpm boost numbers and a 400* drop in egt's. Truck went from making 3lbs of boost against the brakes up to 8lbs. 1lb boost at 60mph cruise up to 4lbs.
We will be dyno testing all of the T6 manifolds shortly to see where we stack up.

GRotman said:

I don't have flow numbers to compare against Steed, but on one of our test trucks that was running a T4 Stainless manifold we saw a big increase in low rpm boost numbers and a 400* drop in egt's. Truck went from making 3lbs of boost against the brakes up to 8lbs. 1lb boost at 60mph cruise up to 4lbs.
We will be dyno testing all of the T6 manifolds shortly to see where we stack up.

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Awesome! Thank you for the reply!

I am looking forward to seeing what your comparison shows. I am in the market for a new manifold as part of my Winter build, the waiting time for a Steed blows. Definitely open to other similar performing options.