Per a dealer (owner of the dealership) Cummins cannot void a warranty if you
use a K&N air filter. Lets see, he gets paid by Cummins for warranty work
and if he makes a mistake the customer ends up paying, resulting in a very
angry customer and not a repeat customer. He looses business. As far as I
know and see K&N has NOT changed their product at all over the years. That
means that Cummins cannot prove that it was the filter that caused the
damage. Was there similar damage done by the stock filter? Maybe there was
damage due to dirt passing through the filter. The question is then is it
more dirt than what passes through a regular OEM filter? Evidently thay
could not prove that.
Check the Gibson Exhaust site.....they have more complete systems than the
I think they had a muffler and tailpipe system for my 99 tahoe....don't
remember about the cat back or suburban.
Also, stay away from the K&N filters.
in some states, it is illegal to change to duals and it will not pass a
You wrote on Mon, 05 Feb 2007 02:40:12 GMT:
NS> I think they had a muffler and tailpipe system for my 99 tahoe....don't
NS> remember about the cat back or suburban.
NS> Also, stay away from the K&N filters.
Well, i will (try) to answer it for you since Snojob has managed to
side track everyone, once again. Being that it is a 99, you will not
find an out of the box true dual system for it. I know this because I
have a 99 Silvy and IIRC the 'Burban uses a similarly designed set-
up. Now, if you want true duals, this can be done and relatively
inexpensive also. You will cut the Y-pipe where it goes from two 2.5"
pipes - one 3" pipe, have welded (or do it yourself) on some 2.5"
pipes to run the lenght you want, buy a 2 in/out muffler and be done
Cost, as example, a 5' section of 2.5 pipe from Jegs is about 12
bucks, a good Magnaflow muflfer for trucks is about 130 and then
Check out www.fullsizechevy.com in the forums, there are tons of
people that have done exactly what you want to do, running everything
from straight pipes, to glass packs, etc..
Answer it for you?
As to the filter question, I can tell you I run a K&N type filter on my
Silvy and live in AZ, so you can imagine what type of environment I drive
in. Anyway, I can't say it has made a noticeable difference on HP, but I
did notice that between the cold air setup getting cooler air in and the
better exhaust, that the pick up when I need it (like merging on to I-10 at
75 mph), is much more responsive.
I also have not noticed any more or less dirt building up on the MAF or the
throttle body and I do check. So, this option is up to you.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.