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Old 01-03-2013, 12:16 PM   #1 (permalink)
Zorganov
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NF2 and NF4

anyone out there know what the difference is between these two options? They are both LB7's, but what's the difference?
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2003 2500HD Ext Cab Bowtie ZF-6
40% Over injectors and 66mm Garrett turbo are the major mods.....
EFI Live for that LITTLE extra
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Old 01-03-2013, 11:28 PM   #2 (permalink)
maxinDixon
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NF2 is emissions system federal tier one, and NF4 is emissions system clean fuel fleet (as in the same emissions as CA).
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GMC '04 2500HD SLE CC D/A LB7 SB Summit White, LineX, Nicktane, JK headlight harness and fuel pump with harness, HIR lowbeams, Banks exhaust, EFI Live, Horn mod, Suncoast 6 speed conversion, injectors at 112,265, injector #8 replaced at 136,078 and again all 8 at 168,368.
VW '02 Jetta Wagon TDI 6 spd ERF, Bosio DLC520 injectors, Malone stage 2 tuning.
VW '01 NB TDI 6 spd ERF, Bosio PP764 nozzles, Malone stage 2 tuning. Driving made fun!
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Old 01-04-2013, 08:44 AM   #3 (permalink)
Zorganov
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And suddenly it all makes sense! Thanks maxinDixon!
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2003 2500HD Ext Cab Bowtie ZF-6
40% Over injectors and 66mm Garrett turbo are the major mods.....
EFI Live for that LITTLE extra
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