What are the key features of the PPE Cast Iron Cylinder Heads 01-04 GM 6.6L Duramax LB7?

Fuel injector cups cast into the cylinder head; 21-4N Stellite-reinforced exhaust valves, fully nitridated; Chrome-silicon alloy intake valves, fully nitridated; Chromoly steel CNC machined spring retainers and locators; Tapered valve springs for faster response; Powder metal valve seats; Reduced engine clatter vs. factory aluminum heads; Increased thermal efficiency vs. aluminum heads; 3-Year Unlimited Mileage Warranty; Sold individually

Are there any important fitment notes for the PPE Cast Iron Cylinder Heads 01-04 GM 6.6L Duramax LB7?

Valve seats are installed with an interference fit optimized for durability; for extreme-performance applications generating significant heat, PPE suggests replacing exhaust valve seats with higher interference (+0.006" to +0.008") oversized seats (nominal size 34mm).

SKU #: PPE-110100101 MPN #: 110100101

PPE Cast Iron Cylinder Heads 01-04 GM 6.6L Duramax LB7

Name: PPE Cast Iron Cylinder Heads 01-04 GM 6.6L Duramax LB7
Brand: PPE (Pacific Performance Eng.)
Price: 1349.99 USD
Availability: BackOrder

$1,349.99

Get 1349 points in loyalty rewards

PPE Cast Iron Cylinder Heads for 01-04 GM 6.6L Duramax LB7

Description Overview

If it becomes the unfortunate time for you to replace heads in your LB7 Duramax, look no further than the PPE Cast Iron Cylinder Head. This cylinder head offers the same heat expansion rate as the OEM cast block that completely resolves the common head gasket scrubbing issue. The specialty alloyed gray cast iron liquid cooled cylinder head has elevated strength in higher temperatures with creep resistance so blown head gaskets are a thing of the past. Each head comes complete with brand new springs, spring retainers, spring locators, valves, valve seals, valve keepers, valve seats, valve guides, rocker arm dowels, and freeze plugs. The upgraded tapered valve springs provide faster response and eliminate valve float at high rpms and the CNC machined spring retainers and locators keep them all in place. The premium 21-4N stellite reinforced exhaust valves and chrome silicon alloy intake valves are all fully nitridated with increased abrasion resistance. Another feature of this upgraded head is the fuel injector cups are cast into the cylinder head, eliminating leaks caused by factory fuel injector cup seals.With a set of these heads, you will notice a reduction in engine clatter compared to factory aluminum heads. Each head comes with a 3-year unlimited mileage warranty. Sold individually.

Enter your zip and we'll see if installation is available.

Request quotes from local installers at checkout
Compare options and choose the best fit for your install

Free Customer Loyalty Program

No Salesmen, Just Enthusiasts

PPE Cast Iron Cylinder Head is a replacement head with integral cast injector cups and CNC machined spring retainers, matching OEM block heat expansion to resolve head gasket scrubbing.

Fits: 2001-2004 6.6L GM Duramax LB7
Brand: PPE (Pacific Performance Eng.)
Best for: Replacing worn or gasket-failed cylinder heads
Key features: Fuel injector cups cast into the cylinder head
21-4N Stellite-reinforced exhaust valves, fully nitridated
Chrome-silicon alloy intake valves, fully nitridated
Chromoly steel CNC machined spring retainers and locators
Tapered valve springs for faster response
Powder metal valve seats
Reduced engine clatter vs. factory aluminum heads
Increased thermal efficiency vs. aluminum heads
3-Year Unlimited Mileage Warranty
Sold individually
Important: Valve seats are installed with an interference fit optimized for durability; for extreme-performance applications generating significant heat, PPE suggests replacing exhaust valve seats with higher interference (+0.006" to +0.008") oversized seats (nominal size 34mm).

If it becomes the unfortunate time for you to replace heads in your LB7 Duramax, look no further than the PPE Cast Iron Cylinder Head. This cylinder head offers the same heat expansion rate as the OEM cast block that completely resolves the common head gasket scrubbing issue. The specialty alloyed gray cast iron liquid cooled cylinder head has elevated strength in higher temperatures with creep resistance so blown head gaskets are a thing of the past.

Each head comes complete with brand new springs, spring retainers, spring locators, valves, valve seals, valve keepers, valve seats, valve guides, rocker arm dowels, and freeze plugs. The upgraded tapered valve springs provide faster response and eliminate valve float at high rpms and the CNC machined spring retainers and locators keep them all in place. The premium 21-4N stellite reinforced exhaust valves and chrome silicon alloy intake valves are all fully nitridated with increased abrasion resistance. Another feature of this upgraded head is the fuel injector cups are cast into the cylinder head, eliminating leaks caused by factory fuel injector cup seals.

With a set of these heads, you will notice a reduction in engine clatter compared to factory aluminum heads. Each head comes with a 3-year unlimited mileage warranty. Sold individually.

EXECUTIVE ORDER #D-701-38

Manuals and Guides

INSTALL INSTRUCTIONS

Vehicle Fitment

2001-2004 6.6L GM Duramax LB7

WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov

IMPORTANT NOTE:

The valve seats of the PPE Heavy Cast Iron Cylinder Heads are installed with an interference that maximizes the durability and lifespan of the cylinder heads. Such interference might not be optimal for extreme-performance applications where a significant amount of heat is created. For those applications, PPE suggests that the exhaust valve seats be replaced with higher interference (+0.006'' to +0.008'') oversized exhaust valve seats (Nominal size 34mm).

FEATURES & BENEFITS:

Sold individually
Fuel injector cups are cast in the cylinder head
Premium 21-4N Stellite-reinforced exhaust valves fully nitridated
chrome-silicon alloy intake valves fully nitridated
Chromoly steel CNC machined spring retainers and spring locators
Tapered valve springs
Powder metal valve seats
Significantly reduced diesel engine clatter compared to the factory aluminum cylinder heads
Increased thermal efficiency compared to aluminum heads
3-Year Unlimited Mileage Warranty

About PPE (Pacific Performance Eng.)

Browse PPE Diesel Parts Online by Make, Model, and Year. Originally founded in 1985, Pacific Performance Engineering (PPE) is leading the way in the progression of diesel performance. Their roots started them in the diesel performance industry installing other manufacturers kits and components, which led to the release of their original product, the Duramaximizer, in 2001 to improve upon the power and efficiency of the LB7 Duramax, and is still in use today. Today, they are known for manufacturing dual CP3 kits, their line of Xcelerator programmers for numerous applications, upgraded oil pans, and nearly anything you can think of to improve the power and extend the life of your Duramax, Cummins or Powerstroke.