Cat Delete Pipe Costing Me Big MPG Loss . . .

[rgdillon]

WIll this test pipe work on a stock exhaust system?

I have a 2005 X 6.0.

Hey - Welcome to SDD

Good to see another Virginian here - - this site is starting to get over run by Texans (Not that I have anything against Texas - as a Cowboys fan - I'm glad Texas is there ).

To answer your question Mike - No, not without modification. The part that connects to the downpipe would with no problems - but since the stock system is 3.5" and the cat "test" pipe is 4" - it would be tricky. And with the stock muffler - you wouldn't get the same sound.

But hey - you wanted to upgrade your system anyway didn't you

When you do get ready - use one of the site sponsors - they know diesels and they know your truck - and each and everyone will stand behind the products with excellent support.

Ron

 

[DaveBen]

Yes it will, it is a cat delete pipe and you can remove the cat and use the pipe.
Welcome to our site. Great avatar!

Dave

 

[bushpilot]

WIll this test pipe work on a stock exhaust system?

I have a 2005 X 6.0.

i dont see why not, but at the same time once you remove the
cat your most restrictive & HEAVIER piece is the MUFFLER...

do a CAT back MBRP system & add the test pipe.

 

[ranger boy]

i dont see why not, but at the same time once you remove the
cat your most restrictive & HEAVIER piece is the MUFFLER...

do a CAT back MBRP system & add the test pipe.

do a turbo back while your at it, no reason to half-ass on your truck

 

[rgdillon]

do a turbo back while your at it, no reason to half-ass on your truck

Well - someone correct me if i'm wrong here - but the downpipe is not 4" at the turbo and does not change to 4" until it gets to the cat - am I wrong?

Personally I don't see paying for something - that you already have. And without doing a a turbo back you avoid any conflict with Ford over attaching a system to the turbo.

Just my view on it.


Also - from the DPP site:

The Test Pipe is Designed Specifically for Use ONLY with the MBRP Turbo Back Systems, It will NOT Install Without Possible Modifications to a Factory Exhaust System!

Ron

 

[bushpilot]

Well - someone correct me if i'm wrong here - but the downpipe is not 4" at the turbo and does not change to 4" until it gets to the cat - am I wrong?

Personally I don't see paying for something - that you already have. And without doing a a turbo back you avoid any conflict with Ford over attaching a system to the turbo.

Just my view on it.

Also - from the DPPI site:

The Test Pipe is Designed Specifically for Use ONLY with the MBRP Turbo Back Systems, It will NOT Install Without Possible Modifications to a Factory Exhaust System!

Ron

actually the MBRP is 3.5" too, until after the cat, where it moves
to the 4".

this is the case w/ the MBRP, no matter what it is...cat back or
turbo back.

the MBRP isnt 4" til you install their mid-pipe (which goes on AFTER
the cat OR after the cat delete pipe).

the mbrp mid-pipe which connects between the cat (or cat delete)
pipe & the muffler...this mid-pipe is ALSO the pipe that gets "trimmed"
based on the type of truck you have (long-bed/short bed, etc).

ron remember too that in your installation the MBRP cat delete pipe
provided a connection between the factory down pipe and your
silverline cat-back system...so we KNOW the mbrp cat delete pipe
will work w/ other systems

and to a large degree i agree w/ ron about the factory down
pipe...they really are the same size 3.5 inches (ford & mbpr).

BUT...the factory down pipe is crimped and sharply bend in many
places...and the FORD down tube/plumbing also interferes w/
the trans cross member...you either cut the FORD pipe or you
pull two bolts out & drop one side of the cross member, like i did, to
remove the factory down pipe...

the MBRP down pipe is MANDREL bend and SMOOTH (no crimps, like
the factory) and it is joint is placed in such a location/manner
that it does NOT interfere w/ the trans cross member (like the
factory plumbing does)

 

[rgdillon]

actually the MBRP is 3.5" til til the END of the cat...it doesnt go
til 4" til AFTER the cat (w/ an MBRP "mid-pipe" that has a 3.5" inlet &
the expansion to 4" is done w/ the MBRP mid-pipe...)
. . .

Can I claim water on the brain or like to much drug use in a previous life?

Ron

 

[Hoss 350]

Hate to be that guy, guys, but I really must protest. THe cats are there for a reason.

Okay, I am done being a nanny goat today. Later

 

[bushpilot]

Hate to be that guy, guys, but I really must protest. THe cats are there for a reason.

Okay, I am done being a nanny goat today. Later

Hoss you'd make a great moderator over @ TDS...there im done now too

fact of the matter is the cat installed fords diesel trucks cant
possibly function properly...you see for a CAT to work it MUST
have pre & post O2 Sensors...

the way a CAT works is in co-ordination w/ the O2 Sensors...you see the
computer reads the mixture pre & post cat and then changes the
mixture to be "in compliance" w/ emission guidelines...

a cat doesnt properly function until its "up to temp"...so when you
start your car and its cold the 02 reading/measurments are dis-reguarded....

early systems didnt bother w/ POST cat 02 measurments...they simply
ASSUMED the cat was working...most systems NOW have more than
2 and sometimes more than 4 O2 sensors...(adjusting banks on
each side to be rich or lean in order to reduce emissions)....all you
need is ONE bad 02 sensor...itll force the computer to change the
mixture to improper levels and the next thing you know you got
a melted/plugged cat (go ahead ask me how i know)

plug a cat, run it long enough, and youll have toasted valves or
worse.

the cats on OUR trucks are nothing more than SOOT traps because
theres no 02 sensors...and from an emissions perspective soot
traps are nothing more than a band-aide on a perceived problem.

disconnect or remove your CAT and ill bet you TRUCK TITLES you
never get a single code, MIL or CEL dash light turned on...EVEN on
a california based truck....

 

[Tx_Atty]

y'all are making my head hurt.....