Steed Speed CAT C15

STUD KIT NOT INCLUDED

The best manifold you can buy for your C15. A beautifully crafted CNC billet steel masterpiece! Far superior performance than any other product.

EGTs were 150 degrees lower than even the best aftermarket manifold while spooling the turbo faster with higher peak boost and 6 lbs less drive pressure. This manifold is one piece so will never leak and is easy on studs and gaskets. In normal service it shouldn’t need to be retorqued either.

Expect long service life and the best fuel economy ever from this manifold.

"A beautifully crafted CNC billet steel masterpiece! During testing, EGTs were lowered while spooling the turbo faster with higher peak boost and less drive pressure. This manifold is one piece so will never leak and is easy on studs and gaskets. In normal service it shouldn’t need to be retorqued either. Expect long service life and the best fuel economy ever from this manifold. 

Fits round port 3406 models & C15 models under Pete and Kenworth hoods.   Can also be used on C15 Acerts Converted to single turbo. 

*Direct Replacement for 146-9445, confirm casting number before ordering if concerned about fitment

* DOES NOT INCLUDE Turbo Studs or nuts.  You can add a set of our ARP Studs above, or source your own (3/8-16)

ACERT: Fits all C15 Acerts running factory compound turbos (BXS, MXS, NXS, SDP)

*Direct Replacement for 231-3462, confirm casting number before ordering if concerned about fitment

TWIN GATED C15: These are 2.5" v-band style wastegate ports.  This manifold gives you the option to run 1, 2, or 0 wastegates (Just install plug plates in place for 0 or 1 gate).  If you are looking for the ULTIMATE boost control setup, this is for you.  This design is also more efficient for bypassing the high pressure turbo to feed the atmospheric turbo in a compound setup. "

- Joe Neil