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  • Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
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Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
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Load image into Gallery viewer, Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
Load image into Gallery viewer, Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
Load image into Gallery viewer, Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
Load image into Gallery viewer, Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
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Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857

Exhaust, Mufflers & Tips Catback
Flowmaster
flo737857
In stock
Not CARB compliant. Not legal for sale or use in California on emissions-controlled vehicles.
$986.66 $1,237.95
Flowmaster's® Signature Series Cat-back exhaust system for 2014-2019*(*Classic body 5.3L, 4wd w/143.5-inch wb) GM Silverado/Sierra 4.3L and 5.3L engines. This performance exhaust system fits both 2/4 Wheel drive models with 143.5 and 153-inch wheelbases and is manufactured from brushed 304 stainless steel for years of trouble-free service and highend good looks. This premium exhaust system is TIG welded for a stronger, more precise weld that looks as good as this system sounds. Features include a 3.00-inch inlet pipe leading into a TIG welded 304 stainless steel Signature Series "straight-through" muffler for great sound and maximum performance. The single 3.00-inch mandrel-bent tailpipe exits out behind the rear passenger side tire and is finished off with a large 4.50-inch diameter PVD coated black chrome 304S stainless steel tip, giving your Silverado/Sierra that custom look that goes hand in hand with the deep performance sound of the Signature Series muffler. Max dyno gains of 9 hp and 10 lb-ft at the rear wheels. The system uses all the factory hanger locations and connections for an easy installation that you can do at home. Includes installation instructions and all necessary hardware. Fits 2014-2018 GM Silverado/Sierra 1500 4.3L & 5.3L engines, 2/4 Wheel Drive, 143.5...
Flowmaster 24-25 GM 1500 6.2L Signature Series Cat-Back Exhaust System - 738207
Flowmaster 24-25 GM 1500 6.2L Signature Series Cat-Back Exhaust System - 738207
$1,799.95 $1,435.16
Flowmaster 3.00 IN/OUT(C) FlowFX 6 ROUND 14 BODY 20 Muffler - 72619
Flowmaster 3.00 IN/OUT(C) FlowFX 6 ROUND 14 BODY 20 Muffler - 72619
$123.95 $75.88
Flowmaster 14-19 GM 1500 5.3L Cat-Back Signature Series 304 Exhaust System - 737857
SKU: flo737857
Product Details

Everything You Need To Know

Review product information, shipping and returns, and price-match details before you order.

Product Info

Flowmaster's® Signature Series Cat-back exhaust system for 2014-2019*(*Classic body 5.3L, 4wd w/143.5-inch wb) GM Silverado/Sierra 4.3L and 5.3L engines. This performance exhaust system fits both 2/4 Wheel drive models with 143.5 and 153-inch wheelbases and is manufactured from brushed 304 stainless steel for years of trouble-free service and highend good looks. This premium exhaust system is TIG welded for a stronger, more precise weld that looks as good as this system sounds. Features include a 3.00-inch inlet pipe leading into a TIG welded 304 stainless steel Signature Series "straight-through" muffler for great sound and maximum performance. The single 3.00-inch mandrel-bent tailpipe exits out behind the rear passenger side tire and is finished off with a large 4.50-inch diameter PVD coated black chrome 304S stainless steel tip, giving your Silverado/Sierra that custom look that goes hand in hand with the deep performance sound of the Signature Series muffler. Max dyno gains of 9 hp and 10 lb-ft at the rear wheels. The system uses all the factory hanger locations and connections for an easy installation that you can do at home. Includes installation instructions and all necessary hardware.

Fits 2014-2018 GM Silverado/Sierra 1500 4.3L & 5.3L engines, 2/4 Wheel Drive, 143.5 and 153-inch Wheelbases - Also fits 2019 GM 1500 (Legacy body only) 5.3L, 4WD, extended cab w/143.5-inch Wheelbase

Features & Benefits

  • TIG welding offers a more precise weld, better heat control and high-end appearance compared to MIG welding.
  • Signature Series muffler offers a moderate performance tone and increased performance over the stock system.
  • Brushed 304 stainless steel offers maximum corrosion resistance for a cleaner and more high-end appearance.
  • Brushed appearance removes tooling marks for a cleaner overall look.
  • Installer friendly design allows for an at home installation.
  • Increased power and torque over the stock exhaust system.
  • Black chrome tips offer a stylish upscale look.
  • Dyno proven performance gains you can feel.
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In stock items typically ship within 1-3 business days. Most items arrive within 2 business days, but there are situations where it may take up to 5 business days.

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Special order and out of stock items are product-specific and lead times can vary. Please e-mail us if you are looking for an ETA / Lead Time on a specific product. Special order orders are subject to cancellation if the vendor cannot provide any ETA.

Returns Policy

To start the return process, please e-mail sales@allianceracing.com

Include the following:
Subject "Return for Order#"
Order Number
Part Number
Reason

Returns are eligible for up to 14 days from delivery of items. Accepted refunds can take up to 7-10 business days to process. All refunds are subject to a 25% restocking fee, if opened. Customer may be responsible for return shipping. If 14 days have gone by since your item was delivered, unfortunately we can’t guarantee you a refund or exchange. We reserve the right to deny any return request, based on provided information.

Alliance Racing is not responsible for ensuring part fitment. It is the responsibility of the purchaser to ensure the parts being ordered are the correct fitment for the vehicle intended. Alliance Racing will not accept any returns for incorrect fitment after product is opened.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

Shipping

To return your product, mail your product to:
Alliance Racing LLC
8810 Twin Lakes Blvd
Tampa, FL 33614

In many cases, you will be responsible for shipping costs to return your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping will be deducted from your refund.

Depending on your location, the time it may take for your exchanged product to reach you may vary.

If you are shipping an item over $100, you should consider using a trackable shipping service and/or purchasing Shipping Insurance.

To initiate a price match, please e-mail sales@allianceracing.com with the product information (SKU, URL, & Part Name) and a link to the competitors product page for us to validate the price match eligibility.

Please note that there are cases when we cannot offer a price match, but we will do everything in our power to try to match it. Some manufacturers have Pricing Policies that we have to adhere to.

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