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 IN STOCK FPE-INTAKEHORNIncrease your LB7?s potential with this simple, but effective upgrade. Back-to-back dyno pulls showed an increase of 15hp with this Fleece Performance Modified LB7 Intake Horn ? that?s about the cheapest 15hp from a bolt on you?ll find anywhere!... Fleece Performance 01-04 GM Duramax 6.6L LB7 High Flow LB7 Intake Horn 2001-2002 GMC Sierra 3500 SL 2001-2004 GMC Sierra 3500 SLE / SLT 2002-2004 GMC Sierra 3500 Base $120.76 |