The UnderCover Flex is a hard folding truck bed cover that gives you the ultimate control of your truck bed, offering three secure riding positions. The cover is easy to install and remove with our easy clamp-on design, and is mounted flush with your trucks bed rails making it the most watertight hard folding cover on the market. The Flex is constructed with heavy-duty aluminum panels providing strength and durability.

Each Flex has a bed rail mounting system equipped with rubber seals and drain tubes that carry water away from and out of the bed, keeping your gear dry and secure. The Flex is backed by a 3-year warranty making it America's favorite hard folding tonneau cover.

Now your 19-20 Silverado/Sierra can perform and sound as good as it looks with this aFe POWER Vulcan Series cat-back exhaust system. 4inch to dual 3inch mandrel-bent, 304 stainless steel tubing and high-flow muffler improves performance across the power band and delivers a deep, aggressive exhaust tone. 100% MIG-welded for strength and durability. Quad 4inch polished 304 stainless steel exhaust tips for an aggressive custom look.

4inch to Dual 3inch 304 Stainless Steel Tubing:
This system is constructed of durable mandrel-bent 4inch to dual 3inch 304 stainless steel tubing for maximum corrosion resistance. Mandrel-bent tubing for maximum air flow and low turbulence; increasing torque, horsepower and improved throttle response.

High-Flow Performance Muffler:
A single-in, dual-out high-flow stainless steel muffler allows increased exhaust flow and reduces exhaust drone, maintaining a deep, tuned sound.

Quad Polished Tips:
Quad 4inch polished 304 stainless steel exhaust tips replace the factory tips for an aggressive, custom sport truck look.

Perfect Fit:
Factory-style bayonet hangers are used to maintain a stable pipe location during high vibration and high heat conditions for a secure fit.

Hassle-Free Installation:
Quality hardware and clamps are included for a hassle-free installation.

It may be necessary to cut the OE Exhaust to remove it from the vehicle.

Now your 19-20 Silverado/Sierra can perform and sound as good as it looks with this aFe POWER Vulcan Series cat-back exhaust system. 4inch to dual 3inch mandrel-bent, 304 stainless steel tubing and high-flow muffler improves performance across the power band and delivers a deep, aggressive exhaust tone. 100% MIG-welded for strength and durability. Quad 4inch black 304 stainless steel exhaust tips for an aggressive custom look.

4inch to Dual 3inch 304 Stainless Steel Tubing:
This system is constructed of durable mandrel-bent 4inch to dual 3inch 304 stainless steel tubing for maximum corrosion resistance. Mandrel-bent tubing for maximum air flow and low turbulence; increasing torque, horsepower and improved throttle response.

High-Flow Performance Muffler:
A single-in, dual-out high-flow stainless steel muffler allows increased exhaust flow and reduces exhaust drone, maintaining a deep, tuned sound.

Quad Black Tips:
Quad 4inch black 304 stainless steel exhaust tips replace the factory tips for an aggressive, custom sport truck look.

Perfect Fit:
Factory-style bayonet hangers are used to maintain a stable pipe location during high vibration and high heat conditions for a secure fit.

Hassle-Free Installation:
Quality hardware and clamps are included for a hassle-free installation.

It may be necessary to cut the OE Exhaust to remove it from the vehicle.

Touring and Towing Level

We're proud to announce the FIRST Australian made full twin 3in system to suit the RAM 1500 5.7L HEMI V8.

•  Featuring a set of 1 3/4in primary 4-into-1  headers, with 3in outlets (available with ceramic coating)

•  Full twin 3in system with H-pipe, and hotdog + muffler centre

•  Tailpipes with 5in chrome tips (available with black tips also)

•  Awesome V8 sound 

Our full system routes the exhaust away from the transmission, behind the crossmember, thus eliminating the issue of the exhaust contributing to the transmission temperature. Our catback system goes off the back of the factory Y-pipe, so therefore does not alter this area at all.

Performance Level

We're proud to announce the FIRST Australian made full twin 3in system to suit the RAM 1500 5.7L HEMI V8.

•  Featuring a set of 1 3/4in primary 4-into-1  headers, with 3in outlets (available with ceramic coating)

•  Full twin 3in system with H-pipe, and hotdog + muffler centre

•  Tailpipes with 5in chrome tips (available with black tips also)

•  Awesome V8 sound 
  

Our full system routes the exhaust away from the transmission, behind the crossmember, thus eliminating the issue of the exhaust contributing to the transmission temperature. Our catback system goes off the back of the factory Y-pipe, so therefore does not alter this area at all.

Performance Level

We're proud to announce the FIRST Australian made full twin 3in system to suit the RAM 1500 5.7L HEMI V8.

•  Featuring a set of 1 3/4in primary 4-into-1  headers, with 3in outlets (available with ceramic coating)

•  Full twin 3in system with H-pipe, and hotdog + muffler centre

•  Tailpipes with 5in chrome tips (available with black tips also)

•  Awesome V8 sound 

Our full system routes the exhaust away from the transmission, behind the crossmember, thus eliminating the issue of the exhaust contributing to the transmission temperature. Our catback system goes off the back of the factory Y-pipe, so therefore does not alter this area at all.

High Flow 409 Stainless Steel Muffler:
This 409 stainless steel High-Flow muffler is designed to provide a deep throaty, powerful sound on acceleration, but maintain a smooth sound at idle. This muffler is constructed uses a straight through perforated core with heat resistant packing to reduce backpressure and maximize flow. Also featuring a stamped aFe POWER logo for an added style. Muffler Specifications: 4" Center Inlet /Outlet, 8" Round x 24" L Body Diameter.

OE Fit:
Features OE-style bayonet hangers to maintain stability during high-rev vibration and high-temp conditions. Provides hassle-free installation.

Flow and Performance:
This Rebel XD exhaust system is constructed of 4" mandrel-bent 409 stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and throttle response.

Exhaust Tips:
Finishing off this exhaust are dual 5" black stainless steel straight-cut intercooled exhaust tips featuring a laser-cut stainless steel "aFe POWER" badge for added style.

Fits:
2017 Chevrolet Silverado HD 2500/3500 V8-6.6L (td) Duramax
2017 GMC Sierra HD 2500/3500 V8-6.6L (td) Duramax

Wheelbases:
Extended Cab/Short Bed, 6.6 ft. Bed, 143.5 Wheelbase
Crew Cab/Short Bed, 6.6 ft. Bed, 153.7 Wheelbase
Extended Cab/Long Bed, 8 ft. Bed, 158.1 Wheelbase
Crew Cab/Long Bed, 8 ft. Bed, 167.7 Wheelbase

Note 1:
Cutting is required for some cab configurations.

DETAILS:

• +11 HP / +10 lbs. x ft. Torque Max Gains
• Outflows Factory Intake by up to 58%
• Computer Designed Roto-Molded Intake Tube
• One-Piece Sealed Housing
• Pro 5R Oiled 5-Layer Progressively Finer Mesh Cotton Gauze Oiled Media for Maximum Performance
• CNC Machined, High Quality Billet Aluminium Fittings
• Built-In Sight Window Provides Easy Inspection of Filter Without Disassembly
• Unique (Patent Pending) Filter-to-Housing Interface for Easy Installation

• Unique One-Piece High Quality Housing:
  The smooth one-piece high quality plastic sealed housing is used to eliminate the use of multiple-piece housings and ensure the coolest air intake charge available. A large, clear sight window is used for a hassle-free filter inspection and an aggressive style.

  High Quality Tube:
  This system uses a high quality cross-linked polyethylene plastic computer designed, dyno-tuned, roto-molded intake tube to achieve maximum power gains while maintaining a perfect fit. Two CNC machined, high quality billet aluminium fittings are mounted on the tube to provide a perfect connection with the factory vacuum lines.

  Huge 5-Layer Performance Air Filter:
  The Momentum GT intake is designed around a pre-oiled, large 9" Tall conical inverted top 360 degree radial flow performance air filter with 5-layers of progressive finer mesh cotton media providing maximum airflow and performance. The unique air filter-to-housing interface (patent pending) allows for maximum filter size which increases the available air volume while simplifying the installation process.

  Premium Hardware:
  A premium stainless steel T-bolt clamp and a polyurethane coupling are used for strength and durability while also providing the most secure installation available. Momentum GT intakes are designed with fewer parts for a quick and simple installation.