Moderate Straight-Through Performance

Introducing Flowmaster's line of FlowFX exhaust systems. These systems are perfect for the person looking for an moderate exterior and interior sound level with all of the performance benefits that you would expect from Flowmaster. New features include bright 409S stainless steel tubing mated to our new FlowFX straight-through mufflers with a large 3.00 inch core for maximum performance and a deep, aggressive sound. 

Fitment Information

• Chevy Silverado 1500 (1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007)
• GMC Sierra 1500 (1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007)
• (Classic Body) 4.3L, 4.8L, 5.3L with 143.5 inch wheelbase

Emissions Compliance

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Specs & Features

• Increases of 6.7 HP and 6.5 FT/LBS over the stock exhaust
• System produces a nice rumble with minimal internal resonance
• Large 4.50-inch black ceramic coated stainless steel tip offers an aggressive look
• Includes complete hardware and factory styled hangers in stock locations for an easy installation
• FlowFX "straight-through" performance muffler delivers a deep tone and improved exhaust flow
• Mandrel-bent 16-gauge 409 stainless steel tubing maximizes exhaust flow with excellent corrosion resistance
• Lifetime Limited Warranty

Product Description

This Flowmaster® Flow FX® Flow FX cat-back exhaust system is designed for 1999-2007* (*Classic Body) GM Silverado/Sierra 1500 trucks with 4.3L, 4.8L & 5.3L engines and features 409 stainless steel construction for added durability and 16-gauge mandrel-bent tubing for free unrestricted flow. The compact, oval "straight-through" Flow FX performance muffler attaches behind the catalytic converter and delivers a moderate, deep and powerful sound with minimal interior resonance. The mandrel-bent stainless tailpipe tucks up high in the undercarriage protecting it from being crushed when traversing rocky terrain. This system uses the factory hanger locations and is finished off with a 4.50-inch black ceramic-coated 304 stainless steel tip embossed with the Flowmaster name. The kit includes detailed instructions and all hardware necessary for a quick and easy installation you can do at home. Covered by our Lifetime Limited Warranty.

Redline360 is an authorized Flowmaster dealer and sells only genuine Flowmaster products.