Restrictive exhaust parts
Jun 5, 2012 | 10:09 PM
#1
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Teching In
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Restrictive exhaust parts
2005 Tahoe, 5.3L(non flex), 4x4
So what are the REALLY restrictive parts? Stock cats obviously are. How about the muffler? What hp are the manifolds good up to? Not gonna do much to the engine besides a CAI eventually and a tune. Maybe a better stock LS cam next year.
Would shorty headers be worth the money or are there a better set of stock manifolds?
So what are the REALLY restrictive parts? Stock cats obviously are. How about the muffler? What hp are the manifolds good up to? Not gonna do much to the engine besides a CAI eventually and a tune. Maybe a better stock LS cam next year.
Would shorty headers be worth the money or are there a better set of stock manifolds?
Jun 5, 2012 | 11:01 PM
#2
TECH Fanatic
Joined: Feb 2009
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From: Baton Rouge, LA
Muffler is the most restrictive item on there. The stock cats flow pretty well but if you're going for high revving power then they will be an issue. The stock manifolds will flow as much as you want but a set of longtubes will give you a power boost in the mid to high ranges.
Shorty headers are a waste of money. The OE shorties (what you have now) perform better.
Shorty headers are a waste of money. The OE shorties (what you have now) perform better.
Jun 5, 2012 | 11:14 PM
#4
On The Tree
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From: Bow Island, AB
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Jun 6, 2012 | 01:15 AM
#9
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Ok good info here. I did notice the stock manifolds do look like headers. Im basically just going for some more low end torque so long tubes can wait till I decide to get nuts with this thing.
Do most of you just go with a cat-back or just replace the muffler?
Are our pipes stainless or aluminized from the factory?
(asking because my 2001 Bonneville SSEi had stainless pipe all the way back from the plant). If they arent stainless I may just drop the extra coin on it and know that it will last for a long time.
I had a '94 YUKON and replaced the factory cat-back with a Gibson unit and really liked the sound. I am not a fan of the Flowmaster tinny sound.
Do most of you just go with a cat-back or just replace the muffler?
Are our pipes stainless or aluminized from the factory?
(asking because my 2001 Bonneville SSEi had stainless pipe all the way back from the plant). If they arent stainless I may just drop the extra coin on it and know that it will last for a long time.
I had a '94 YUKON and replaced the factory cat-back with a Gibson unit and really liked the sound. I am not a fan of the Flowmaster tinny sound.
Jun 6, 2012 | 01:20 AM
#10
Joined: Apr 2004
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From: In a van DOWN BY THE RIVER