FrankBUILT Performance 2001-2004 LB7 Duramax 6.6L Head Gasket Kit w/Studs

FrankBUILT Performance LB7 Head Gasket Combo Kit (2001–2004 Duramax 6.6L LB7)

Built for durability and precision, this LB7 Head Gasket Combo Kit gives your Duramax a complete top-end sealing solution — combining premium MAHLE gaskets, Merchant Automotive hardware, and your choice of ARP, PPE, or OEM fasteners for maximum reliability and performance.

Includes:

• MAHLE HS54580 Head Set – Complete upper gasket kit with O-rings, seals, and RTV
• MAHLE 54597 – Left Multi-Layered Steel (MLS) Head Gasket
• MAHLE 54598 – Right Multi-Layered Steel (MLS) Head Gasket
• Merchant Automotive 10040 – Injector Return Line Seals Kit

Required Option (Select One):

Choose one head stud or bolt option to complete your kit:

• ARP 230-4201 – ARP Head Stud Kit
• GM 11610681 – OEM Head Bolt Set
• MAHLE GS33504 – MAHLE Head Bolt Set
• PPE 118034300 – PPE Head Stud Kit

(One of the above options is required for purchase.)

Optional Cylinder Heads:

Fleece Performance FPE-61-10001-D-CL Freedom Series Cupless Cylinder Head
Premium direct-fit replacement for your LB7 that eliminates injector cup failures. Built from a brand-new aluminum casting, CNC-machined, and pressure-tested for durability. Ready to install with all new components.

• No injector cups to leak — cupless injector bore design
• Brand-new aluminum casting (no core charge)
• CNC-machined with multi-angle valve job
• Pressure & leak tested for reliability
• New valves, guides, springs, and seals included
• Ideal for daily drivers and towing applications
• Fleece recommends GM 12637785 head gasket (Grade C, Left)
  

PPE 110100101 Cast Iron Cylinder Head
Heavy-duty upgrade for the LB7 designed to eliminate cracking, warping, and sealing issues. Cast in the USA from specialty alloyed gray cast iron for consistent clamping under heat.

• 214N nitrided exhaust & chromoly-silicone intake valves
• 125 lb conical valve springs with chromoly retainers
• Cast-in injector cups eliminate leakage
• Includes freeze plugs and dowels preinstalled
• Prevents gasket scrubbing and cracking under heat
  
• Upgraded pushrods recommended

PPE 110100111 Cast Iron Ported Cylinder Head
High-performance version featuring 5-axis CNC-ported intake and exhaust runners for improved airflow and power. Cast from premium alloyed gray iron to perfectly match the block’s expansion rate, eliminating head gasket issues.

• 5-Axis CNC-ported intake and exhaust ports
• Reduced noise & vibration for a smoother ride
• Premium 21-4N, Stellite-reinforced nitridated valves
• Higher fatigue strength, heat resistance & efficiency
• Alloyed gray cast iron matches block expansion rate
• Eliminates blown head gasket & injector cup issues
• Includes rocker arm dowels & freeze plugs preinstalled
• Ready to install – no machining required
  

Features:

• Direct-fit replacement for 2001–2004 GM 6.6L Duramax LB7
• Multi-Layered Steel (MLS) head gaskets for maximum durability
• Rubber intake and MLS exhaust manifold gaskets included
• Complete top-end solution with alignment pins and RTV sealant
• Compatible with stock, towing, and performance builds
• Trusted brands: MAHLE, ARP, PPE, Fleece, Merchant Automotive

Fitment:

• 2001–2004 Chevrolet Silverado 2500HD / 3500HD (6.6L Duramax LB7)
• 2001–2004 GMC Sierra 2500HD / 3500HD (6.6L Duramax LB7)