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Need Cat-back for new '03 Silverado

TedH

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TedH Enthusiast

TedH

Posted
Posted

All,

 

I'm brand new to this forum. I hail from the corvetteforum and after my 8/15/03 purchase of an '03 Chevy Silverado Ex Cab Z71, I'm looking for some customization options. So far, I've got a bed liner and chrome step bars. I'm searching for after-cat exhaust systems. Just want folks to know I'm coming but still want to take long trips without getting a headache from the verb's!

 

Thanks for the help and glad y'all are here! :cool:

 

Some info on my 'rado:

 

Victory Red

4.8L Vortec

4 speed auto/OD

Z71 off-road pkg

towing pkg

3.73 gears, locking rear diff

Extend Cab/4 door

 

incredibly quiet.

 

I'm leaning toward Flowmaster 70's. Is there an after-cat Flowmaster 70 kit for my '03?

chevy2000 Enthusiast

chevy2000

Posted
Posted

You might want to look into the Magnaflow brand for your truck. A coupld of months ago, I just recently put a magnaflow stainless steel muffler and magnaflow stainless steel tips on my 2000 Z71. I love the sound. I also got some 409 grade stainless tubing to complete the system. The exhaust has a nice rumble while accelerating, but quiets out when driving and cruising around. No drone at all when going on long trips. My system was a "custom" system, I purchased and pieced all of the components, but I know that magnaflow makes some bolt on cat-back systmes.

Good luck, and let us know what you decide to use on your truck!

Kania2k1 Senior Enthusiast

Kania2k1

Posted
Posted

I picked up the American Thunder system from Jegs.com I believe it comes with a 40 series, but don't quote me on that. It's getting a nice rumble when I coast down hills. By me likey. You might not. Just my $.02

sonjaab Senior Enthusiast

sonjaab

Posted
Posted

TED.....Be careful on installing those after market cats!

One of the fellas BDBWTF on the 2500 HD thread here

had his factory warranty voided because of his..............

 

3 dealers told me warranty void if I put a snowplow on any

new GM truck without VYU plow prep. pkg. also.....

 

Check it out!................geo

hcvone Enthusiast

hcvone

Posted
Posted

Corsa makes a nice kit, not cheap but built very well, you can get the Sport or Touring version, the Touring version has a nice sound without getting on your nerves.

Mike_P Enthusiast

Mike_P

Posted
Posted

Hi Ted!

 

I just installed a Gibson cat-back system on my 1999 GMC Sierra,

with great results! At highway speeds, the truck is no louder than

stock....but when pulling away from a stop, it makes a nice deep

tone, but not rediculously loud like some of the Flowmaster systems.

 

Fortunately, I had the opportunity to audition the exhaust first, as a

co-worker put the same exhaust system on his truck.

 

Installation took two hours, and everything fit very well.

All components are mandrel bent and aluminized for longer life.

 

Good luck,

 

Mike

awdvkd Enthusiast

awdvkd

Posted
Posted

Dealers can not void a warranty due to changes in the exhaust!!!! :thumbs::nono: They can only do it if the different muffler is causing what is wrong with your truck. Dealers who say things like that are ignorant or stealers!!! Find a new dealer, believe it or not there are a lot of dealer who are very aftermarket friendly. There are some around here that actually sell brand new trucks with lifts on them. As to your muffler question, MAGNAFLOW is really good if you want something that increases HP, sounds good on acceleration and is quiet at an idle. The dual in dual out really opens it up w/o loss of low end torque which seems to be a problem with some systems.

TedH Enthusiast

TedH

Posted
  • Author
Posted

I'd be thankful for any part numbers for the Gibson, Magnaflow, Corsa, or other brand name cat-back kits. The Gibson system sounds much like what I am seeking (quiet at highway speeds but good sound under acceleration).

 

Thanks all that have responded. Much appreciated! :thumbs:

sirlan Enthusiast

sirlan

Posted
Posted

I also just had a Gibson exhaust installed on my '02 4.8 Z71. I concur with what Mike P said. It's not obnoxiously loud but it does have a nice, deep rumble when pulling away from a stop. Lately, I've been driving with my windows down just to hear the exhaust.

 

Also, since you're looking for mod ideas, I just installed a K&N FIPK intake with good results.

Sandman1 Enthusiast

Sandman1

Posted
Posted

I had a Gibson single-in /dual 2.5in. cat back system on my 99 Silverado 5.3.

The system was actually too quiet for me. I ended up having the muffler cut out and replaced it with a Magnaflow. If you want it quiet the Gibson is the way to go. If you want a little sound without being obnoxious go for the Magnaflow.

sk Senior Enthusiast

sk

Posted
Posted

FWIW -- Page 17 of the GM Accessories brochure shows a Corsa system that you can buy right through the GM dealership. There is a note that says that accessories are warranted by the individual manufacturers and not by GM dealers, but if it's an approved GM accessory then it won't void your overall warranty. There were no part numbers listed but you can check it out here (scroll down to Page 17):

 

http://www.gmgoodwrench.com/accessories/im...035128265407529

 

 

Scott

bigtruck21 Enthusiast

bigtruck21

Posted
Posted
I had a Gibson single-in /dual 2.5in. cat back system on my 99 Silverado 5.3.

The system was actually too quiet for me. I ended up having the muffler cut out and replaced it with a Magnaflow. If you want it quiet the Gibson is the way to go. If you want a little sound without being obnoxious go for the Magnaflow.

which system made more power...both low end and high end?

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