You aren't going to see a big difference in a cat back system on an otherwise
stock engine anyway, regardless of the size of the tailpipe. The improvement
you do see is going to come from the less restrictive muffler.
FWIW, the pipes that you get with a cat back system are manderal bent compared
to compression bent in a stock system. They will flow better than the stock
pipe because they do not have the crimps from bending. The difference is likely
not noticable to the seat of your pants.
Again FWIW, I have the Flowmaster Cat back system that came with a 2.5"in 3"out
three chamber muffler and a 3" tailpipe on my 3.9. It made a noticable
differnence above 3000 rpm but no change below that rpm. The v8 throttle body
and air intake also only helped in the upper rpm range.
If I hadn't got the system for x-mas from my wife I would have just cut out the
stock muffler and replaced it with a performance muffler. IMHO, If you are
looking save some money swap the muffler. If you are looking for less hassles
installing it go for the cat back regardless of whether it has a 3" tailpipe or
2.5" tailpipe.
Dave Clement
99 SLT+ CC 4x4
In article <cm6kaf$1nn$1@bent.twistedbits.net>, chris92@insightbb.com ("Chris
Reck") writes:
>
>
> Hi,
>
> It's been a while, but I was away from my desk. I went under and measured
> my pipes. It seems that I have 2.5" OD pipes before and after the Cat and
> Muffler. Is this right? I'm now questioning myself on how replacing a
> stock 2.5" pipe with a new 2.5" pipe (granted different muffler), would make
> that big of a difference?
>
> Is increasing 1/2" really that big of an increase, or am I all wet?
>
> Also, the WLK-17353 lists for my truck, but it also lists it as a 3" pipe
> all the way out.
>
> I was also looking at getting the Catalytic Converter CTO-9185 from Summit
> as well (since mine is going bad). This is a 2.5" in and out (same as
> stock).
>
> Should I be looking at this or do I just need to keep my pipes and replace
> the muffler (replacing entire Cat pipe due to low cost and ease of install).
>
> Thanks!
>
> --
>
> --
> Chris Reck
> Bloomington, IL
>
> '99 Dakota Sport + CC 4x4 V6 (Deep Amethyst)
> Shaved and polished V8 TB, Autolite 3923, 180 Thermostat, 7.5mm Bosch plug
> wires,
> Custom K&N 6x9 air intake, Rancho RSX shocks, Pioneer full audio system,
> Jet Stage 1 Chip, BF Goodrich 32x11.5r15 T/A KO tires
>
> ""Jason Bleazard"" <dml@bleazard.net> wrote in message
> news:63593.199.64.0.252.1098996923.squirrel@janor.ath.cx...
> >
> > On Wed, October 27, 2004 8:16 pm, Chris Reck said:
> >>
> >> Do you have a part number at Summit, or a Manufacturer's part number?
> >> The
> >> only thing I saw listed was a 3" pipe.
> >
> > If memory serves (I might be able to find the receipt if you really need
> > to know for sure), the kit I got is WLK-17443. Fits '92 - '96 Dakotas.
> > Currently $113.88 from Summit. That's what I got, and it works for me.
> > Your mileage may vary.
> >
> > Summit has a whole list on their site under "Online Store < Exhaust <
> > Exhaust Systems & Kits < Dynomax Super Turbo Exhaust Systems". Looks like
> > WLK-17353 fits '97 - '99 Dakotas, currently $199.95.
> >
> > I think Dynomax might also have an application guide on their own site.
> > That would probably have more information.
> >
> > --
> > Jason Bleazard http://www.bleazard.net Burlington, Ontario
> > his: '95 Dakota Sport 4x4, 3.9 V6, 5spd, Reg. Cab, white
> > hers: '01 Dakota Sport 4x4, 4.7 V8, Auto, Quad Cab, black
> >
> >
>
>
This archive was generated by hypermail 2b29 : Sat Jan 01 2005 - 11:47:51 EST