Holley EFI LS Hi-Flow Holley EFI EFI Fuel Rails 54-1431 Large Plenum Volume of 549

Large Plenum Volume of 549 Cubic Inches (w/ 1 x 95mm or 1 x 105mm Throttle Body Top)

Note these shields are FIA rated only

422 in Long

1993-1995 GMC K1500

Holley EFI LS Hi-Flow Holley EFI EFI Fuel Rails 54-1431 Large Plenum Volume of 549LS Hi Flow Holley EFI Fuel Rails Fits LS1, LS2, LS3, LS6, L76 & L99 factory intakes If this product is to be used with aftermarket (tall) EV1 performance injectors: LS2, LS3, and L99 applications will require taller brackets and adapter O rings to be used with EV1 injectors. Holley part number HLY534 212 will have these required parts. LS1 and LS6 application will work with EV1 injectors without any additional parts. Holley part number HLY534 211