2003 GMC Sierra Cat-Back Exhausts
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Borla Cat-Back System 01-07 GMC Sierra Classic 6.0L/8.1L V8 HD 2+4WD EC SB (14990)
Borla Cat-Back System 01-07 GMC Sierra Classic 6.0L/8.1L V8 HD 2+4WD EC SB (14990)

Fits - 2003 GMC Sierra

Pipe Size: 3", 2.25"Tip Type: S RD RL ACTip Exit: split sideTip # 36Tip Dimensions: 4" RD x 14"
Our Price
$1110.99
$1243.99 (10.69% OFF)
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Borla Cat-Back System 99-07 GMC Sierra 4.3L V6/4.8L/5.3L V8 2+4WD AT/MT EC SB incl Classic (140014)
Borla Cat-Back System 99-07 GMC Sierra 4.3L V6/4.8L/5.3L V8 2+4WD AT/MT EC SB incl Classic (140014)

Fits - 2003 GMC Sierra

Pipe Size: 3"Tip Type: S RD RL ACTip Exit: sideTip # 36Tip Dimensions: 4" RD x 14"
Our Price
$586.99
$656.99 (10.65% OFF)
Product Details
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Borla Cat-Back System 03-05 GMC Sierra 6.6L V8 2+4WD AT/MT 4DR EC SB (140117)
Borla Cat-Back System 03-05 GMC Sierra 6.6L V8 2+4WD AT/MT 4DR EC SB (140117)

Fits - 2003 GMC Sierra

Pipe Size: 4"Tip Type: S RD RL ACTip Exit: sideTip # 39Tip Dimensions: 5" RD x 14"
Our Price
$816.99
$914.99 (10.71% OFF)
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Borla Cat-Back System 01-07 GMC Sierra 6.0L V8 (Incl HD) 2+4WD AT/MT 4DR CC SB incl Classi (140033)
Borla Cat-Back System 01-07 GMC Sierra 6.0L V8 (Incl HD) 2+4WD AT/MT 4DR CC SB incl Classi (140033)

Fits - 2003 GMC Sierra

Pipe Size: 2.75", 2.25"Tip Type: S RD RL ACTip Exit: split rearTip # 36Tip Dimensions: 4" RD x 14"
Our Price
$824.99
$923.99 (10.71% OFF)
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Borla Cat-Back System 03-05 GMC Sierra 6.6L V8 2+4WD AT/MT 4DR CC LB (140116)
Borla Cat-Back System 03-05 GMC Sierra 6.6L V8 2+4WD AT/MT 4DR CC LB (140116)

Fits - 2003 GMC Sierra

Pipe Size: 4"Tip Type: S RD RL ACTip Exit: sideTip # 39Tip Dimensions: 5" RD x 14"
Our Price
$816.99
$914.99 (10.71% OFF)
Product Details
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Borla Cat-Back System 01-07 GMC Sierra Classic 6.0L/8.1L V8 HD 2+4WD CC SB (14959)
Borla Cat-Back System 01-07 GMC Sierra Classic 6.0L/8.1L V8 HD 2+4WD CC SB (14959)

Fits - 2003 GMC Sierra

Pipe Size: 3", 2.25"Tip Type: S RD RL ACTip Exit: split sideTip # 36Tip Dimensions: 4" RD x 14"
Our Price
$1020.99
$1142.99 (10.67% OFF)
Product Details
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Borla Cat-Back System 03-05 GMC Sierra 6.6L V8 2+4WD AT/MT 4DR CC SB (140097)
Borla Cat-Back System 03-05 GMC Sierra 6.6L V8 2+4WD AT/MT 4DR CC SB (140097)

Fits - 2003 GMC Sierra

Pipe Size: 4"Tip Type: S RD RL ACTip Exit: sideTip # 39Tip Dimensions: 3" RD x 7.5"
Our Price
$816.99
$914.99 (10.71% OFF)
Product Details
Add To Cart
Borla Cat-Back System 99-07 GMC Sierra 4.8L/5.3L V8 2+4WD AT/MT EC SB (Z-71) incl Classic (14825)
Borla Cat-Back System 99-07 GMC Sierra 4.8L/5.3L V8 2+4WD AT/MT EC SB (Z-71) incl Classic (14825)

Fits - 2003 GMC Sierra

Pipe Size: 3", 2.25"Tip Type: S RD RL ACTip Exit: split sideTip # 36Tip Dimensions: 4" RD x 12"
Our Price
$855.99
$958.99 (10.74% OFF)
Product Details
Add To Cart
Borla Cat-Back System 99-07 GMC Sierra 4.8L/5.3L V8 2+4WD AT/MT EC SB (Z-71) incl Classic (14824)
Borla Cat-Back System 99-07 GMC Sierra 4.8L/5.3L V8 2+4WD AT/MT EC SB (Z-71) incl Classic (14824)

Fits - 2003 GMC Sierra

Pipe Size: 3", 2.25"Tip Type: S RD RL ACTip Exit: split rearTip # 36Tip Dimensions: 4" RD x 14"
Our Price
$855.99
$958.99 (10.74% OFF)
Product Details
Add To Cart
Borla Cat-Back System 99-07 GMC Sierra 4.8L/5.3L V8 2+4WD AT/MT RC SB incl Classic (14818)
Borla Cat-Back System 99-07 GMC Sierra 4.8L/5.3L V8 2+4WD AT/MT RC SB incl Classic (14818)

Fits - 2003 GMC Sierra

Pipe Size: 3", 2.25"Tip Type: S RD RL ACTip Exit: split rearTip # 36Tip Dimensions: 4" RD x 14"
Our Price
$855.99
$958.99 (10.74% OFF)
Product Details
Add To Cart
Borla Cat-Back System 99-07 GMC Sierra 4.8L/5.3L V8 2+4WD AT/MT RC SB incl Classic (14940)
Borla Cat-Back System 99-07 GMC Sierra 4.8L/5.3L V8 2+4WD AT/MT RC SB incl Classic (14940)

Fits - 2003 GMC Sierra

Pipe Size: 3", 2.25"Tip Type: S RD RL ACTip Exit: split sideTip # 36Tip Dimensions: 4" RD x 12"
Our Price
$931.99
$1043.99 (10.73% OFF)
Product Details
Add To Cart
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Cat Back Exhaust

Featured Cat Back Exhausts Products


  When considering serious 2003 GMC Sierra cat back exhausts upgrades for their vehicles, many drivers focus on installing the most effective 2003 GMC Sierra cat back exhaust system. A catback exhaust is the portion of an exhaust setup that contains all the components from the rear of the catalytic converter on down. Finely tuned 2003 GMC Sierra cat back exhausts serve as excellent 2003 Sierra racing exhausts, and with all of the proper parts like universal mufflers and sleek tail pipes included, the setup can provide the sound and emissions flow a serious driver would want.

2003 GMC Sierra Cat Back Exhaust 2003 GMC Sierra Megan Racing Cat Back Exhaust 2003 GMC Sierra Cat-Back Exhausts 2003 GMC Sierra CatBack Exhausts


2003 GMC Sierra Catalytic converters are the starting points for 2003 GMC Sierra cat back exhaust upgrades, and for good reason. These 2003 GMC Sierra converters help to make emissions cleaner and less polluting, and can correct problems caused by unruly 2003 GMC Sierra car exhausts. While mufflers focus on sound control and 2003 GMC Sierra exhaust pipes and tips are often upgraded for their looks more than anything, entire 2003 GMC Sierra cat back exhaust system upgrades can really affect the whole vehicle in a positive way, making for a cleaner, better looking exhaust array.


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Surprisingly good quality for the price. Adheres nicely and hasn't shown any signs of fading. Shipping time was just over a week. Thank you guys.
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good coilover kit for my IS, significantly improved the handling on cornering and not too stiff for daily use. highly recommended.
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  Willy G.  -  (Atlanta GA)
This is my second set of spring for my GTR. I used to ride with Eibach but the front height is higher than my rear. Swift spring rides perfect. The height is even so my car dont look like a drag race car anymore. lol Anyways. I love this purchase
  Marcus S.  -  (Staunton, VA)
Super nice fender add on, great quality pieces
  Eric L.  -  (bastrop, TX)
I got my Drifter Cobalt kit about 2 weeks ago and I am almost done with the installation (by myself). The front and side fitted alrite w/ some trimming. The rear needed more work but it is expected from a fiberglass kit.

Cat Back Exhaust, Performance Exhausts & more

44 reviews 4.5 out of 5 stars

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