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MagnaFlow Performance Exhaust System 16673: Cat-Back, Street Series, For 2003-2006 Hummer H2

  • Based on 13 reviews
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Fulfilled by MAGNAFLOW
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Features

  • ICONIC MAGNAFLOW SOUND - The Street Series is engineered to deliver the resonant, throaty sound that MagnaFlow is famous for. Exhaust kit 16673 has been tuned to produce superior interior and exterior sound levels for an enhanced driving experience when installed on your vehicle.
  • DYNO-PROVEN PERFORMANCE - Extensive dyno testing is used to ensure that this cat-back exhaust system increases engine power and performance by improving the flow dynamics and evacuation of exhaust gases.
  • PRECISION ROBOTIC CONSTRUCTION - Durable, corrosion-resistant stainless steel construction and CNC precision robotic manufacturing techniques guarantee reliable system performance for the life of your vehicle. 16673 is proudly made in the USA.
  • PERFECT FITMENT - This direct-fit Street Series system fits onto your vehicle easily thanks to the extensive use of 3D scanning during development to ensure OEM-like fitment. 16673 includes all the hardware necessary for do-it-yourself installation.
  • LIMITED LIFETIME CONSTRUCTION WARRANTY - Performance that lasts. Enjoy worry-free ownership knowing that you're backed by MagnaFlows limited lifetime construction warranty

Brand: Magnaflow


Item Dimensions LxWxH: 59 x 14.25 x 20.75 inches


Vehicle Service Type: Van, Car, Truck


Inlet Connection Size: 4 Inches


Brand: ‎Magnaflow


Item Dimensions LxWxH: ‎59 x 14.25 x 20.75 inches


Vehicle Service Type: ‎Van, Car, Truck


Inlet Connection Size: ‎4 Inches


Item Package Dimensions L x W x H: ‎59 x 21.5 x 14 inches


Package Weight: ‎65.1 Pounds


Brand Name: ‎Magnaflow


Warranty Description: ‎Warranty


Model Name: ‎MagnaFlow Performance Exhaust System 16673 Cat-Back, Street Series, For 2003-2006 Hummer H2


Color: ‎No Color


Suggested Users: ‎unisex-adult


Number of Items: ‎1


Manufacturer: ‎MagnaFlow Exhaust Products


Part Number: ‎16673


Included Components: ‎MagnaFlow Performance Exhaust System 16673 Cat-Back, Street Series, For 2003-2006 Hummer H2


Size: ‎No Size


Date First Available: May 22, 2008


Frequently asked questions

This product is currently out of stock. Please check back later for shipping info.

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Awesome System!
I usually do all my repairs but I realized that by installing this exhaust system, I would need a lift to get the clearance I needed to install so I ended up bringing it to my local auto repair man. Most do not want to install client supplied products but he agreed. After he installed it he said to me he couldn't believe what a great system it was and how he had to do minimal work to make it fit (which is the main complaint when you install aftermarket exhaust) The system fit great, increased performance and makes my Hummer sound Awesome! I highly recommend it! Product was packaged well and chrome end pieces on tailpipes were bubble wrapped. Everything was complete with no missing parts and arrived a week earlier than expected! Would def buy again from these guys again! ... show more
Reviewed in the United States on July 12, 2023 by mark minotti

  • Semi dissapointed
Dealing with Amazon was an awesome experience. Product showed up earlier than anticipated (which was not a problem). Love the looks of the exhaust system. REAL easy to change out. But I expected it to be louder than it is. It really sounds good at 2500-3000 RPM. I figured Magnaflow could have shaved a couple dollars off of the product by NOT fully polishing the muffler, as it can't be seen on my vehicle, but would be great for a show truck. ... show more
Reviewed in the United States on September 11, 2012 by Bill

  • Corrodes super fast.......
Nice mellow tone but after only 2 months in to NH winter with minimal snow it looks like a rusty mess. For the price of it I'm beyond disappointed. I have painted steel exhaust systems and a diamond eye system on trucks that have lasted 14years and still look beter than this system after only 2 months installed. ... show more
Reviewed in the United States on March 14, 2023 by Ben Thompson

  • Fits and sounds great
Great fitment and sound.
Reviewed in the United States on June 12, 2023 by Scott H.

  • Hummer H2
I purchased Magnaflow cats and this cat back exhaust. The quality of the product is nice. The fit is was not the best and the install was a little tough. The pipes had to be slightly bent in order to clear the shields and the flange in front of the muffler doesn't come with nuts for the built in bolts - neither to the cats. So, be sure to pick a set up prior to the install. The guide recommends re-using the OEM bolts - I wrung mine off trying to remove the prior exhaust. ... show more
Reviewed in the United States on June 24, 2014 by JackR

  • Great product
Fit like a glove. Easy no problems. The only thing I can say is they don't provide the flange nuts or new rubber hangers. Other than that 5 Star.
Reviewed in the United States on April 28, 2021 by Geo

  • Five Stars
Great sound and straight forward installation. Fit just fine on our Hummer H2 2003.
Reviewed in the United States on August 14, 2018 by Suny

  • Magnaflow 16673 Stainless Steel Dual Cat-Back
Love the sound and look . Love your Hummer and buy this product
Reviewed in the United States on May 3, 2017 by Darren K.

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