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86-91 GM Truck/SUV w/4.3L V6, 5.0L,5.7L V8- SMOOTH-BORE Throttle Body Spacer; 1986-91 Chevy/GMC Trucks and SUVs with 4.3L V6 or 5.0L, 5.7L V8- Cast Aluminum SMOOTH-BORE Throttle Body Spacer; (SINGLE Wing Nut Air Cleaner)

92-95 GM Truck/SUV w/4.3L V6, 5.0L,5.7L V8- SMOOTH-BORE Throttle Body Spacer; 1992-95 Chevy/GMC Trucks and SUVs with 4.3L V6 or 5.0L, 5.7L V8- Cast Aluminum SMOOTH-BORE Throttle Body Spacer; (DOUBLE Wing Nut Air Cleaner)

1987-90 7.4L Chevy/GMC Trucks/SUVs or Motorhome-SMOOTH-BORE Throttle Body Spacer; 1987-90 7.4L Chevy/GMC Trucks/SUVs and Motorhomes- Cast Aluminum SMOOTH-BORE Throttle Body Spacer

91-95 7.4L V8 GM Truck, SUVs and Motorhomes- SMOOTH-BORE Throttle Body Spacer; 1991-95 7.4L V8 Chevy/GMC Trucks, SUVs and Motorhomes- Cast Aluminum SMOOTH-BORE Throttle Body Spacer