Fits: 2017 thru 2024 Chevy Silverado/GMC Sierra 2500HD/3500HD L5P & 2019-2024 4500HD/5500HD/6500HD L5D Duramax Diesel

Replace the restrictive factory cast parts with Wehrli Custom Fabrication's 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. 

Features:

• Fully TIG welded, CNC machined billet steel
  
• Finished in Black Ceramic Coat rated for 1800ºF
• Enhanced exhaust flow, improve turbo spool up & lower EGT's
• Increased power and economy
• 1/8 NPT port (and optional plug) included in driver side manifold for installation of EGT or drive pressure sensor
• Fully compatible with OEM up-pipes or WCFab 2" Stainless Up Pipes
• No tuning required
• This kit works correctly with EGR and all emissions controls present for the 2017-2024 L5P/L5D

Includes:

• Driver & Passenger Billet Exhaust Manifolds
  
• Manifold, EGR flange & manifold to up pipe gaskets
• ARP 12pt. fasteners, washers & assembly lube

Notes:

• Only compatible with OEM style up pipes or WCFab 2" Stainless Up Pipes
  
• 3-5 business day processing time before shipment