+3 Fuel Injector Return Lines for 2001-2004 Chevy GMC 6.6l LB7 Duramax KB-6.6l-LB7-FIRL $108.95 In stock Quantity: 1 Add to Bag Product Details Cross Reference:: 97188733, 800915, 800-915 Fuel Injector Return Lines for 2001-2004 Chevy GMC 6.6l LB7 Duramax engines. Services RH & LH engine bank (all 8 injectors) Fits: 2001-2004 Chevy/GMC 2500/3500 6.6l LB7 Duramax engines Save this product for later Favorite