’06-07 LBZ

Diesel World - - Buyer's Guide -

MAX HORSEPOWER: 460-500 HP TUN­ING: EFI LIVE

Es­sen­tially the same in­jec­tion sys­tem (along with sim­i­larly sized tur­bos) was used across the board on ’01-10 GM trucks. This means that even though the LBZ came with con­sid­er­ably more fac­tory horsepower than the LLY and LB7 ver­sions (360 hp vs. 310 hp and 300 hp, re­spec­tively) the ’06-07 trucks still hit a wall some­where near the 500hp mark. And while the six-speed Al­li­son proved stronger than its fivespeed pre­de­ces­sor, it too re­quires some beef­ing up in or­der to sur­vive 500 hp and 1,000 lb-ft. Again, ZF-6 equipped trucks with up­graded clutches seem to make a lit­tle more power than au­to­mat­ics, but we have seen one ’06 sport­ing a stock Al­li­son dyno 499 hp with­out a lift pump.

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