PDI Big Boss CAT 3406E/C15/C16 Exhaust Manifold

3 reviews
  • $1,750.00

Available for: 1994-2004 3406EC15C16 Engines

CAT Manifold CARB EO# D773-2

Key Benefits

  • 20% increase in airflow over stock
  • 75-100 degree cooling of EGTs
  • Made in the USA

Warranty: 3 Year Unlimited Mile Warranty

We have designed our exhaust manifolds to maximize the exhaust air flow to reduce turbo lag time and cool exhaust temperatures. In the design of the manifold each port is analyzed and tested to provide a balanced flow to the turbocharger. Big Boss Exhaust Manifolds produce, on average, a 20% air flow increase over a stock manifold, cooling exhaust temperatures by 75-100 degrees. PDI manifolds are a big part in maintaining the best exhaust pressure to boost pressure ratios which will provide potential for increased fuel economy.

At PDI, we use only the best material for our products. We use a superior grade of High Silicon with Molybdenum Ductile Iron (HSMD) that eliminates weak points such as warping, cracking, and center divider failure from heat erosion. This material, combined with a redesign of the mounting surfaces, eliminates common failures due to a fatigued manifold.

*Suggested Product: E Model Exhaust Manifold Install Kit


Install Video:

Customer Reviews
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Lyla M.
United States United States

Couldnt be happier

People talk about the price of the PDI products but I think the price of a turbo and a manifold is a drop in the bucket compared to rebuilding a C15 engine. My EGTS dropped 300 minimum. I haven't seen touch 900 since the PDI big boss turbo and manifold and previous to that I had to back out of constantly because it would jump up to 1200 in just a few seconds of a hard pull . I'm running a 625 file and I can let her eat now .

Alexander O.
United States United States


The best Tengo un Engine CAT MBN 2003 esto no es cuento es la realidad. Le cambie manifold y se acabó el problema. No hay escape, no se calienta y cambió el sonido del Engine es otro, Se lo recomiendo sin dudas

Kevin W.

Great Products! Great People! A Five Star Company in My Book!!!

When I first started with PDI we had all B model Cat’s, we had always had problems with Exhaust temperature heat. We tried one of the big boss turbos and for the first time we were able to use the power and keep the exhaust temperature down!! Since then we have replaced all the B models with PDI C15s and one C16 motors, they are amazing, the people at PDI are the best!!! And no we’re not looking to change shops anytime soon!!! Thanks to Jerad and the group at PDI we’re still trucking!! They are a five star company in my book!!!