Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6-Black DOG SWAG highest performing street muffler we've

highest performing street muffler we've ever built in a four inch case

1 Pump and 2 Rail cores MUST be returned in the manufacture boxes to receive core credit

7L Cummins Cab & Chassis

Your engine's fluid capacity is increased

These new products are the first of the Vintage Series family of die-cast aluminum dress up products featuring a classically inspired finned design and a retro-style Holley script brand mark

Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6-Black DOG SWAG highest performing street muffler we'veEFI fuel rails are machined for 8AN O ring Fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system and come standard with EFI Hi Ram kits.