close promo banner icon

cat-back

MagnaFlow Exhaust Products 15671 - Street Series Performance Cat-Back Exhaust System

rating-star review rating-star review 1rating-star review 2rating-star review 3rating-star review 4
stock messaging In StockIn Stock
Ships within 24 hours
SELECT YOUR VEHICLE

This part fits

  1. 2004 Ford Mustang GT Naturally Aspirated 4.6L V8 cid:281
  2. 2004 Ford Mustang Mach I Naturally Aspirated 4.6L V8 cid:281
  3. 2003 Ford Mustang GT Naturally Aspirated 4.6L V8 cid:281
  4. 2003 Ford Mustang Mach I Naturally Aspirated 4.6L V8 cid:281
  5. 2002 Ford Mustang GT 4.6L V8 cid:281
  6. 2001 Ford Mustang GT 4.6L V8 cid:281
  7. 2000 Ford Mustang GT 4.6L V8 cid:281
  8. 1999 Ford Mustang GT 4.6L V8 cid:281
Authorized Dealer

About this product

Part #: 15671

Made in the USA and engineered to last, for those seeking increased performance and better economy, MagnaFlow Touring Series Performance Exhaust systems deliver the smooth deep sound you want and the wide-open performance power you need. Our exhaust systems feature straight-through flow designs for the ultimate in unrestricted horsepower and torque for big power while maintaining exhaust efficiency. These systems are an engineered balance of interior and exterior noise levels and are tested against SAE j1169 standards.

More Details

Attachment TypeBolt-On
Exhaust Pipe MaterialStainless
Exhaust TypeDual
Exit PositionDual Split Rear
Exit QuantityDual
Exit StyleDual Split Rear
FinishStainless
Inlet Connection TypeBolt-On
Inlet Inside Diameter2.500 in.
Main Piping Diameter2.500 in.
MaterialStainless
Muffler Body Diameter4.000 in. x 9.000 in.
Muffler Body FinishPolished
Muffler Body Height4.000 in.
Muffler Body Length14.000 in.
Muffler Body MaterialStainless Steel
Muffler Body ShapeOval
Muffler Body Width9.000 in.
Muffler FinishPolished
Muffler TypeStraight-Through
Outlet Outside Diameter3.500 in.
SeriesStreet
Sound LevelModerate
System TypeCat Back
Tip FinishPolished
Tip Length16.000 in.
Tip MaterialStainless Steel
Tip Quantity2
Tip ShapeRound
Tubing Diameter2.500 in.
Additional Documents
  1. Installation Instructionspdf

See what our community says about magnaflow-exhaust-products products

product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Research
Is this your first time buying from this brand? Did you consider other brands?
Yes it was my first time. I considered a few other brands.
Was it easy to install? Any installation tips that will help others?
Needed to weld to my old Y-pipe and then had to make a few parts to connect to my Corsa Cat back. Was difficult to install.
Once you've had a chance to use the product, did it meet your expectations?
Passed my eCheck. Very loud and good rumble. Very happy with the sound and performance
View on Jimmy's build
Mark Wessel

675

Mark Wessel
2004 Audi A4
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
I wanted something that had a more aggressive tone than factory, and was less restrictive.
Was it easy to install? Any installation tips that will help others?
Had installed at local shop. Due to not having a lift or welder at the house.
View on Mark's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Sound quality, build quality, ease of installation
Is this your first time buying from this brand? Did you consider other brands?
First time buying a magnaflow kit. I have flowmaster 40 series on my jeep and really enjoy it but wanted a different sound for the mustang. Its got the right amount of volume but zero drone on the highway.
Was it easy to install? Any installation tips that will help others?
I had a local fabrication shop install it. They were very impressed by the fit of the kit, especially considering how much variation there is in older vehicles.
View on Greg's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Cheap and local. Not overly loud.
Is this your first time buying from this brand? Did you consider other brands?
Yes and yes.
Was it easy to install? Any installation tips that will help others?
It's a CBE it's super easy.
Once you've had a chance to use the product, did it meet your expectations?
Sounds good, has one stupid bottleneck for some reason near where it bolts to the downpipe. Chopped that off, and welded in 3" pipe to fix that when the new downpipe was installed.
View on Sean's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
It was a direct bolt on fit. No need for any welding.
Is this your first time buying from this brand? Did you consider other brands?
Yes.
Was it easy to install? Any installation tips that will help others?
I had to move the rest of the exhaust back about an inch temporarily, then slid it back in after the cat was bolted up
View on Depp's build
California prop 65 warningWARNING: Cancer and Reproductive Harm www.p65warnings.cs.gov

*Some manufacturer restrictions apply.

About MagnaFlow Exhaust Products

MagnaFlow is a performance exhaust business through and through, yet they've embraced the importance of the technological developments over the past 30 and spent those years evolving the CarSound Catalytic Converter business into what it is today. Today that technology is applied to all of their high performance exhaust products, from cat-back systems and universal mufflers to catalytic converters. MagnaFlow stakes their 30 year reputation for excellence on every product they sell - a claim made possible only through extensive testing and stringent quality assurance methods. But you've come to expect nothing less from them and they’re proud to deliver.

shipping-worldwide from warehouse

we ship worldwide!

Based in California with 3 warehouses across the country, we’re sending out shipments everyday of the week, even Saturdays. Because your next mod shouldn’t have to wait.

+ FREE GROUND SHIPPING ON U.S. ORDERS OVER $99
Globe international shipping icon
Have a question? Ask an Expert!

Finding the best parts can be tricky

- but not to worry! Our team of experienced American Muscle, JDM, Euro, and off-road tuners are ready to answer your questions (as long as we’re not in the garage wrenching on our own builds).

chat-iconLive Chat
Ask our expert tuners anything!
call_iconCall Us
1 (800) 959-4304
Decorative testimonal quote icon

What do you get when you mix Facebook, Amazon, and your favorite online car forum? You get Wheelwell.com.

undefined supporting their testimonial

Hot Rod Magazine

Decorative testimonal quote icon

Wheelwell helps you organize all your stuff for your car, I’ve loaded all my cars on Wheelwell and you can see all the parts I’ve put in them and that may help you make a decision with your own build.

Matt Farah supporting their testimonial

Matt Farah

The Smoking Tire / The Drive

Decorative testimonal quote icon

This is an awesome new site where enthusiasts can get together and figure out what products work best on their ride.

undefined supporting their testimonial

The Truck Show Podcast