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Part #: MB

MBRP Catalytic Converter Test Pipe

2003-2007 Ford 6.0L Powerstroke
Part #: MB
  6 Reviews
FROM 74.99
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  6 Reviews


XDP - MBRP Authorized Online Retailer XDP is a MBRP Factory Authorized Online Retailer ID# 600207727. We would like you to shop with confidence knowing your purchase is covered by the manufactures warranty.   
Get even more exhaust flow with this MBRP Cat Test Pipe

MBRP Components are jig manufactured to ensure total accuracy. Smooth mandrel bends will give you the best flowing pipes in the industry. Gain extra power and enjoy the EGT reduction as well. Constructed from heavy duty T409 stainless steel or Aluminized Steel you can count on this pipe lasting for years to come.

  • 3.5" T409 Stainless Steel Or Aluminized Construction
  • Increase Power & Efficiency
  • Lower Exhaust Gas Temperatures
  • Mandrel Bent & Jig Manufactured
  • Stainless Steel - Lifetime Warranty
  • Aluminized Steel - 3 Year Warranty

You must have an MBRP turbo-back exhaust system or an MBRP downpipe to use this cat test pipe.

Application Guide:
FAL414 Aluminized Steel
FS9414 Stainless Steel


  • Manufacturer NameMBRP Inc.
  • Weight8.00 lb.


Veary easy install
Location: Alberta Canada
So easy to install and a verry cheap diferance maker. Now my 6.0 has bark baby!!!
Excellent idea from MBRP to keep me legal...sometimes...
Location: NY
The Guy that reviewed this under me. Dustin, I don't think he realized this pipe is designed for the MBRP Exhaust system and not the factory Ford system. In my 03-F250 I had a turbo back stainless steel system and I run this cat delete pipe for the past 2.5 years. The only time I change it out is to go to the state inspection so I can put my cat back in, make sure you antiseize the pipe so you can swap it out every 2 years.
Location: Houston
The pipe comes with a flat gasket and flange that attach to the downpipe. The problem is that the stock down pipe has a flared sealing surface and does not seal against a flat surface. This means that when you install it you have a nice exhaust leak to deal with..... Overall I am not pleased and wish I would have ordered a different product.
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Questions and Answers

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Most Popular Questions

Does this fit the 4" MBRP turbo back exhaust systems?
View Staff Answer 
The MBRP Catalytic Converter Test/Delete is intended for the 4” Turbo-Back MBRP 03-07 6.0L F250/F350 Ford Powerstroke (w/ Stock Cat. Converter).
Does this pipe come with gasket?
View Staff Answer 
The MBRP 6.0L Catalytic Converter Test Pipe will include the gasket.
Will this fit the 5' turbo back system?
View Staff Answer 

The MBRP Catalytic Converter Test/Delete Pipe will only fit an MBRP turbo-back exhaust system that’s designed to retain the factors Catalytic Converter. If your 5” turbo back system is an MBRP and retains the factors catalytic converter, the Test/Delete Pipe will work just fine.

Will this work with a factory exaust system?
View Staff Answer 
you must have an MBRP turbo-back exhaust system or an MBRP downpipe to use this cat delete pipe.
Emissions Notice

This product is not legal for sale or street use in California. Certain aftermarket products are subject to governmental emission standards regulated by the California Air Resources Board. In order for these products to be legal on a specific vehicle in California, the part number must receive a CARB Executive Order (EO) number. This number makes the part legal for use only on specific years, makes and models of vehicles. A decal with CARB EO number for these parts must be displayed in the engine bay to satisfy smog inspection requirements.