Posted: Feb 01 2006 at 6:27am | IP Logged

Frontyfan,

I had both an aftermarket CAI (AirAid) and Exhaust (Banks), but recenly removed the exhaust.  I removed it due to it being louder than I personally wanted, no other reason.  I did notice a loss of low end grunt, which has returned since putting the stock exhaust back on the truck.  But, I have also noticed a drop in my gas mileage as well!  As far as burnt valves, I have only heard of this being a problem if you were to run the engine with no headers or exhaust manifolds on the engine.  Honestly, you could probably remove the stock exhaust completely, leaving the OEM exhaust manifold and CATS in place and not worry about burning the valves!

Can you post a link to the Custom Tubes Products Website?  I'm interesting in see what they have to offer.  I'm considering finding a custom pipe shop that can fabricate a new head pipe and "Y" assembly for my stock exhaust to replace the restrictive stock "Y" pipe, which really looks to be the biggest choke point in the whole stock exhaust setup!  Thanks...

Posted: Feb 02 2006 at 12:46am | IP Logged

the link for custom tube products is the following: although i'm pretty sure it's in this site somewhere, i'm happy to list it again.

http://www.customtubeproducts.com/exhaust.htm

there ya go, they call it a dual exhaust but i'mgonna venture to say it's not a true dual exhaust due to the single muffler, however, it has to flow better than the stock muffler.

Posted: Feb 11 2006 at 7:36pm | IP Logged

AZLS1 wrote: Since there is currently no way to re-program the computer you could end up running the truck lean.

 the ECM will adjust the air fuel mixture to compensate for the increased airflow so there is no risk of that.

Posted: Feb 11 2006 at 11:47pm | IP Logged

kinda argumentitive today?   i am going by what the service manager and i discussed when he ok'd the K & N filter in my truck. i spoke with him about a catback and a NISMO intake. he said it would pose no problems with the engine at all. he said as long as the exaust mods are aft of the cats and sensors, and the K & N filter or Nismo intake are installed properly i will have no issues with it running lean.

 there would HAVE to be some way for the ECM to compensate for different oxygen/airflow levels or  the vehicles running in high elevations would  lean out and be problematic and vehicles at sea level would run rich.