CastFlow Xtreme Manifolds & Up Pipes


Brand: ProFab Performance



Due to Covid 19, our foundry has been unable to keep up with our supply of manifolds. They are unable to give us a time frame for our next batch to arrive. Any orders placed now will be subject to backorder, pending our shipment from the foundry. We apologize for the inconvenience.


This is the CastFlow Xtreme series manifolds and 2″ up pipes.

These are for trucks WITHOUT conventional downpipes. Typical use is twins and hood stack trucks. The passengers side up pipe almost exactly matches the drivers side.

Expect even greater hp, quicker spool up, and lower egts with these.

The standard sets comes WITHOUT an EGR provision.

They are available with ceramic coated that will hold up to 1600 degrees. The coating improves performance a little and drops underhood temps. Our ceramic coating is a heat coating only, not a rust preventative.

LMM trucks require a coolant line relocation fitting found in the appropriate section. No gaskets included.

Gasket sets may be added above.

Gasket sets will include 2 manifold/header gaskets, 1 double upper up pipe gasket, and 2 lower up pipe gaskets.

2015’s may need a small spot on the passengers side manifold ground for clearance.

Due to the extreme temperatures possible, ceramic coatings will not be covered by warranty.

Additional information

Weight 35 lbs
Dimensions 21 × 11 × 11 in
1/8" port

1 total, 9 total (+$94.16), 2 total (+$11.77)


Black (+$164.78), Titanium (+$164.78), Silver (+$164.78), No Coating

Gasket set

No gaskets, Gasket set (+$136.06)


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