Replace the lightweight 16G, leak prone, 1 5/8" OEM up pipes on your 2017-2025 6.6L L5P Duramax equipped Chevrolet Silverado or GMC Sierra 2500 / 3500 HD truck with these heavy duty 11 gauge 2" Stainless up pipe kit. HD Stainless Bellows that will not crack and leak like OEM. Increase Turbo spool-up and decrease EGT's. This kit is for use with factory exhaust manifolds. - - Fully compatible with WCFab Billet Exhaust Manifolds (Part Number WCF100373). - - INCLUDES GASKETS! -NO Tuning required, bolt on! -Will fit on stock truck no other modifications or upgrades necessary! - - Replaces the following GM Part Numbers: 12688021, 12702943, 12681437, 12680270, 12681162, 12674813, 12681162, 12676611 - - Also fits 2019+ L5D Duramax (4500/5500/6500) Medium Duty Trucks.

• Fully TIG Welded 11 GA Stainless Steel Construction
• Heavy Duty 2" Passenger Side Up Pipe
• Heavy Duty 2" Driver Side Up Pipe
• Flows 26% Better than OEM
• Up Pipe Gaskets (4)
• NO TUNING REQUIRED
• Made in USA

This Part Fits:

Replace the lightweight 16G, leak-prone, 1 5/8" OEM up pipes with these heavy-duty 11 gauge 2" Stainless up pipe kit. HD Stainless Bellows that will not crack and leak like OEM. Increase Turbo spool-up and decrease EGTs. This kit is for use with single turbo applications and factory exhaust manifolds. - - NOTE: These up pipes ONLY fit with OEM exhaust manifolds or WCFab Duramax Billet Exhaust Manifolds (WCF100363). - - Designed for use with WCFab downpipe. OEM and other aftermarket downpipes may require additional modifications - - Replaces the following GM Part numbers: 97223167, 97302261

• Fully TIG Welded 11 GA Stainless Steel Construction
• Heavy Duty 2" Passenger Side Up Pipe
• Heavy Duty 2" Driver Side Up Pipe
• Includes Up Pipe Gaskets (4)
• Made in USA

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WCFab's 2017-2025 L5P Duramax Billet Exhaust Manifolds replace the restrictive factory cast parts with high-strength, TIG-welded high-flow billet steel components. These manifolds are exhaust port gasket matched and internally divided for optimal flow with OEM or ported cylinder heads. Outlet locations allow full compatibility with OEM style up pipes and are designed to be paired with WCFab's 2" Stainless High-Flow Up Pipes (sold separately) for optimized performance. Fully compatible with vehicle emissions system, these L5P Manifolds include the necessary sensor port and EGR riser flange. Includes new gaskets, ARP 12PT fasteners, and assembly lube for easy install (up pipe fastener kits sold separately). Finished in Black Ceramic Coat rated for 1800 deg F.

• Includes ARP 12PT Fasteners and washers for installation to cylinder head. Up pipe fastener kits sold separately as part WCF100199.
• 1/8 NPT ports (and optional plugs) included in driver and passenger side manifold for installation of EGT or drive pressure sensors
• Includes new gaskets for manifold to cylinder head and manifold to up pipe
• Fully TIG Welded, CNC machined billet steel exhaust manifolds
• Finished in Black Ceramic Coat rated for 2000 deg F

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WCFab's 2001-2016 Duramax Billet Exhaust Manifolds replace the restrictive factory cast parts with high-strength, TIG-welded high-flow billet steel components. These manifolds are exhaust port gasket matched and internally divided for optimal flow with OEM or ported cylinder heads. Outlet locations allow full compatibility with OEM style up pipes and are designed to be paired with WCFab's 2" Stainless High-Flow Up Pipes (sold separately) for optimized performance. Includes new gaskets, ARP 12PT fasteners, and assembly lube for easy install (up pipe fastener kits sold separately). Finished in Black Ceramic Coat rated for 2000 deg F.

• Includes ARP 12PT Fasteners and washers for installation to cylinder head. Up pipe fastener kits sold separately as part WCF100240.
• 1/8 NPT ports (and optional plugs) included in driver and passenger side manifold for installation of EGT or drive pressure sensors
• Includes new gaskets for manifold to cylinder head and manifold to up pipe
• Fully TIG Welded, CNC machined billet steel exhaust manifolds
• Finished in Black Ceramic Coat rated for 2000 deg F

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WCFab 4" Turbo Down Pipe for 2004.5-2007 5.9L Cummins with High Mount style turbo on 2nd Gen style exhaust manifold allows for a quick and simple down pipe install. No cutting of your exhaust system required! This down pipe connects to the v-band flange on the exhaust pipe just as your factory turbo/cast elbow did. The upper flange measures 4.6" diameter to mate with S400 exhaust housing. The lower flange connects to the factory exhaust system v-band flange using the OEM v-band clamp. This down pipe is high-temperature ceramic coated and includes heat wrap with clamps and a 4" V-band Clamp for turbo connection.

• The lower v-band flange connects to the factory exhaust system v-band flange using the OEM v-band clamp (New replacement OEM V-Band Clamp sold separately).
• The S400 version (WCF100262) is meant for use with the standard S400 flat exhaust housing flange, which measures 4.6" diameter. (4" v-band clamp included)
• This down pipe comes black high-temperature ceramic coated and includes heat wrap with clamps and V-band Clamp for turbo housing connection.
• Also compatible with 2003-2004 model year trucks which have updated their exhaust system front pipe to the 2004.5-2007 style part
• 4" Turbo Down Pipe for 2004.5-2007 5.9L Cummins with High Mount style turbo on 2nd Gen style exhaust manifold
• Made in USA

This Part Fits:

WCFab's 2017-2025 L5P Duramax Billet Exhaust Manifolds replace the restrictive factory cast parts with high-strength, TIG-welded high-flow billet steel components. These manifolds are exhaust port gasket matched and internally divided for optimal flow with OEM or ported cylinder heads. Outlet locations allow full compatibility with OEM style up pipes and are paired with WCFab's 2" Stainless High-Flow Up Pipes for optimized performance. Fully compatible with vehicle emissions system, these L5P Manifolds include the necessary sensor port and EGR riser flange. Includes new gaskets, ARP 12PT fasteners, and assembly lube for easy install. Finished in Black Ceramic Coat rated for 2000 deg F.

• 1/8 NPT port (and optional plug) included in driver side manifold for installation of EGT or drive pressure sensor
• Fully TIG Welded, CNC machined billet steel exhaust manifolds
• Finished in Black Ceramic Coat rated for 2000 deg F
• Includes new gaskets for manifolds & up pipes
• Includes ARP 12PT Fasteners and Washers

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Replace the restrictive crushed factory down pipe on your 2017-2025 L5P Duramax with this 3.5" Down Pipe for improved exhaust flow. Connects to the DOC outlet flange behind the OEM turbo and mates with OEM exhaust system front pipe with the 4 bolt style flange connection. Black Ceramic Coated and Heat wrapped. Down Pipe includes bungs for sensors and NO tuning required to use this down pipe. WCFab piping kits and emissions compliant tuning recommended for optimum performance gains.

• High Temp Black Ceramic Coat Finish
• Catalyst Back - Emissions Compliant
• 3.5" High Flow Down Pipe
• Heat Wrap Pre-installed
• NO TUNING REQUIRED!
• Made in USA

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Replace the restrictive crushed factory down pipe with this full 3" down pipe. For use with factory turbo or factory style drop in turbo. 2015.5 and newer LML have a 3 bolt flange exhaust system, this down pipe will only work if you use a 2011-2014 style exhaust system with v-band connection. Or you can use our 3 Bolt Flange Stainless Down pipe PN: WCF100705

• Black Ceramic Coating
• Heat Wrap and clamps
• 3" Down Pipe

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Replace the restrictive crushed factory down pipe with this full 3" down pipe. High Temp Ceramic Coated for protection. For use with factory turbo or factory style drop in turbo.

• Black Ceramic Coating
• Heat Wrap & Clamps
• 3" Down Pipe

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Vibrant Performance Donut Style Graphite Gaskets are designed for a variety of flared outlet neck joints.

Vibrant Performance stainless steel race mufflers are densely packed with our premium multi-layered sound absorption materials, TIG welded for optimum durability, and manufactured from 304 stainless steel for optimum durability and corrosion resistance. Vibrant Performance race mufflers are very lightweight, compact, and are designed to comply with muffler requirement rules at race tracks throughout North America. They are available in 5 & 9 overall lengths and inlet I.D. diameters ranging from 3 to 5.

• Densely packed with our premium multi-layer sound suppression materials that produce a very deep and distinctive exhaust note
• Made from 304 stainless steel for optimum corrosion resistance
• A true straight through design

Vibrant Performance stainless steel race mufflers are densely packed with our premium multi-layered sound absorption materials, TIG welded for optimum durability, and manufactured from 304 stainless steel for optimum durability and corrosion resistance. Vibrant Performance race mufflers are very lightweight, compact, and are designed to comply with muffler requirement rules at race tracks throughout North America. They are available in 5 & 9 overall lengths and inlet I.D. diameters ranging from 3 to 5.

• Densely packed with our premium multi-layer sound suppression materials that produce a very deep and distinctive exhaust note
• Made from 304 stainless steel for optimum corrosion resistance
• A true straight through design

Vibrant Performance stainless steel race mufflers are densely packed with our premium multi-layered sound absorption materials, TIG welded for optimum durability, and manufactured from 304 stainless steel for optimum durability and corrosion resistance. Vibrant Performance race mufflers are very lightweight, compact, and are designed to comply with muffler requirement rules at race tracks throughout North America. They are available in 5 & 9 overall lengths and inlet I.D. diameters ranging from 3 to 5.

• Densely packed with our premium multi-layer sound suppression materials that produce a very deep and distinctive exhaust note
• Made from 304 stainless steel for optimum corrosion resistance
• A true straight through design

Vibrant Performance stainless steel race mufflers are densely packed with our premium multi-layered sound absorption materials, TIG welded for optimum durability, and manufactured from 304 stainless steel for optimum durability and corrosion resistance. Vibrant Performance race mufflers are very lightweight, compact, and are designed to comply with muffler requirement rules at race tracks throughout North America. They are available in 5 & 9 overall lengths and inlet I.D. diameters ranging from 3 to 5.

• Densely packed with our premium multi-layer sound suppression materials that produce a very deep and distinctive exhaust note
• Made from 304 stainless steel for optimum corrosion resistance
• A true straight through design

Vibrant Performance stainless steel race mufflers are densely packed with our premium multi-layered sound absorption materials, TIG welded for optimum durability, and manufactured from 304 stainless steel for optimum durability and corrosion resistance. Vibrant Performance race mufflers are very lightweight, compact, and are designed to comply with muffler requirement rules at race tracks throughout North America. They are available in 5 & 9 overall lengths and inlet I.D. diameters ranging from 3 to 5.

• Densely packed with our premium multi-layer sound suppression materials that produce a very deep and distinctive exhaust note
• Made from 304 stainless steel for optimum corrosion resistance
• A true straight through design

Vibrant Performance standard bottle style resonators are round bodied, densely packed with our premium multi-layered sound absorption materials, and manufactured from 304 stainless steel and CP1 Titanium for optimum durability and corrosion resistance. Vibrant Performance standard bottle style resonators have a sleek design that is optimal for easy installation and work to maximize the reduction of exhaust db levels.

• Densely packed with our premium multi-layer sound suppression materials that produce a very deep and distinctive exhaust note
• Made from 304 stainless steel for optimum corrosion resistance
• A true straight through design