The Duramax: 25 Years Later
A quarter of a century ago, GM announced plans to introduce the 6.6L Duramax we’ve all come to know and love.
The Vault
Within the Green Handle vault, we’ve stowed away timeless truck and engine specs, OEM press releases and other essential historical reading you won’t find anywhere else.
Summit 7.3: Celebrating 30 Years Of The 7.3L Power Stroke
Three decades later, the engine that revolutionized the diesel truck market lives on—and this comprehensive 7.3L convention confirms it will be here for many more years to come.
The First First-Gens: The Story You Haven’t Heard
On the eve of the release of the Cummins-powered Dodge Ram, Cummins was every bit as nervous as Chrysler was.
1989-1993 5.9L Cummins
The original 6BT—the engine that revolutionized the diesel pickup segment.
1994-1998 5.9L Cummins
The engine that gave us the P-pump, the '94-'98 12-valve Cummins.
1998.5-2002 5.9L Cummins
Introduction of the 24-valve cylinder head and electronically controlled VP44.
2003-2007 5.9L Cummins
Cummins’ last 5.9L boasts high-pressure common-rail injection and a stronger block.
2007.5-2023 6.7L Cummins
Bigger displacement, more torque and modern emissions equipment.
1994.5-2003 7.3L Power Stroke
The original Power Stroke, the 7.3L, brought HEUI injection and standard turbocharging to Ford's diesel option.
2003-2007 6.0L Power Stroke
Higher injection pressures, 4-valve cylinder heads and a VGT made the 6.0L Power Stroke more powerful than the 7.3L.
2008-2010 6.4L Power Stroke
The Navistar-built 6.4L was the first Power Stroke to feature common-rail injection—and it also came with compound turbos.
2011-2023 6.7L Power Stroke
With a CGI block, reverse-flow heads and air-to-water intercooling, Ford’s 6.7L Power Stroke was ahead of its time.
2001-2004 LB7 Duramax
GM’s 6.6L Duramax brought common-rail injection, aluminum heads, and 300 hp to the diesel truck segment.
2004.5-2006 LLY Duramax
The LLY Duramax moved the injectors above the valve covers and replaced the IHI turbo with a Garrett VGT.
2006-2007 LBZ Duramax
Higher injection pressure, lower compression, and best-in-class horsepower and torque made the LBZ a home run for GM.
2007.5-2010 LMM Duramax
Essentially an LBZ with more emissions equipment, the LMM Duramax added a DPF on top of EGR.
2011-2016 LML Duramax
The LML brought higher injection pressure, improved horsepower and torque, and SCR emissions technology to the Duramax line.
2017-2024 L5P Duramax
A Denso fuel system, an in-tank lift pump, a billet wheel BorgWarner VGT, and more than 900 lb-ft of torque made the L5P Duramax competitive right out of the gate.