• $1,595.00

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

5 Based on 1 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Write a Review Ask a Question
  • Reviews
  • Questions

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Kevin Woods - Woods Trucking

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!!!