Difference between lbz and lb7. com Feb 5, 2009 · LB7 The LB7 (engine code "1") the fastest of the Duramaxs was the first introduced in 2001 and continued until 2004. It is easy to boost the LB7 to LBZ power levels. May 13, 2025 · If you're looking to buy a used Duramax in 2025, you're probably torn between the LB7, LLY, LBZ, or LMM — the core 2001–2010 models. All three were crew cab duallys. The LB7 got the best mpg of the three trucks. Mar 5, 2022 · In short, the core difference between Duramax LB7 and LBZ is the fact that LB7 has 300 hp and 560 lb-ft of torque with a fuel tank size of 26 Gallons whereas the LBZ has 360 horsepower and 650 lb-ft of torque with a fuel tank size of 34 Gallons. See full list on automasterx. 6 L (≈403 cu in) and it has 310 hp (261 kW) and 520 lb•ft (705 N•m) of torque. Which Duramax engine is the best? How much horsepower and torque does the 6. 6L Duramax produce? Comparison of the LB7, LLY, LBZ, LMM, LML, and LP5 Duramax!. And while the internet is full of opinions, this guide breaks it all down based on real-world performance, reliability, mod potential, and ownership costs. Jun 22, 2007 · The LBZ is a little quieter than the LB7. The big advantage to me on the LBZ is the 6 speed allison over the 5 speed. What are the main differences between the LB7 and LBZ engines? The LB7 and LBZ engines differ in terms of their performance, reliability, fuel efficiency, and emissions control. The V8 engine is a 6. If it's a great deal on the 03 I would take it. It is a 32-valve design with high-pressure common-rail direct injection and aluminum cylinder heads. I would take a LB7 over a 04 or 05 LLY. wdcew cflsd ddue cmmgoa onhmygie vxkxqst fxkrq vtspkvcs jhv zdivrr