Flowmaster® (99-07) Silverado/Sierra FlowFX 409SS Cat-Back System (143.5" WB)
1999 - 2007 Chevy Silverado
1999 - 2007 GMC Sierra
Fits 1999-2007* (*Classic body) GM Silverado/Sierra 1500 trucks with 4.3L, 4.8L and 5.3L engines, 2/4 wheel drive with 143.5-inch wheelbase.
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.
This Flowmaster FlowFX 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" FlowFX 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.
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