Steeda Mustang GT Side-Exit Cat-Back Exhaust System (1999-2004)

3 Review(s)
$150.00 (19%)
Add 10-12 horsepower and a great exhaust note to your 4. 6L V8 99-04 Mustang GT with this top-quality Steeda stainless steel side exit cat back exhaust kit.
Part Number: 040 13912
If Anderson Composites product is delivered defective or damaged, you must notify Steeda within 24 hours of delivery.

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Add 10-12 horsepower and a great exhaust note to your 4.6L V8 99-04 Mustang GT with this top-quality Steeda stainless steel side exit cat back exhaust kit. This kit produces a deep, rich exhaust note but is tuned not to "drone" at highway speeds.

The kit features a factory fit, and includes installation clamps, front flow tubes, Steeda logo embossed high-flow mufflers and dual tip side pipes with polished tips - the perfect bolt on for your GT. The polished stainless steel exhaust tips are 3.5 inches in diameter and 9 inches long. The tips feature the Steeda logo etched on them and are polished to a near-mirror finish.

Product Benefits
  • Less restrictive than stock exhaust
  • Enhances performance
  • Lifetime warranty

CA Residents: Cancer and Reproductive Harm WARNING

Fitment & Features


Manufacturer: Steeda Autosports
Made in USA: Yes

Installation Information:

Level of Difficulty: Medium
Install Time: About 1 1/2 Hours
Tools Required: Basic Shop Tools

Vehicle Fitment:

Fits Model Year: 1999, 2000, 2001, 2002, 2003, 2004

Customer Reviews

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Average Customer Ratings


Beautiful Product
Great product quality at a reasonable price and was shipped quickly after ordering. I was anxious to get it on my car but found that the side exits wanted to occupy the same space as the welded in frame connectors. I was bummed! It would be good to write that up in the product description to be aware of this interference. Four stars only because I really don't know what they would have sounded like.
Did you find this helpful?  5 of 5 Found Helpful
from Great Bend on 10/14/2020
Perfection by steeda beautiful drone
Did you find this helpful?  2 of 2 Found Helpful
Verified Buyer   from Mississippi on 5/4/2020
Beautiful exhaust kit in every way!
Beautiful exhaust kit in every way! Sound coming out those (Borla) mufflers is smooth and intoxicating. Especially right outside your window! Sounds like a crazy race car on my termi swapped GT. Talk about catches attention! Only down sides are ground clearance and the fact that the rocks flying off my front tires has really peppered up the tips and I have only put about 3000 miles on them. Still extremely satisfied as I am willing to put up with being extra careful over uneven surfaces. After all I am driving a lowered Mustang so I am used to this anyway. Chose this kit to go with my future plan of installing a Steeda 5 link setup with a Roush body kit. Certainly glad I did! Thanks Steeda for making some of my most favorite upgrades!
Did you find this helpful?  40 of 42 Found Helpful
from Florida on 3/13/2010
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