Aussiespeed® Holden 6 cylinder red motor 9 port heads, the 4 barrel manifold suit Holley plus Quick Fuel squarebore carburettors from 390 CFM upwards. The current model manifold allows the carburetor or throttle body to be mounted in the standard north south or east west mounting position without the use of additional plates or adapters.
The AussieSpeed® AS0002 manifold is designed to be used on modified engines and can be used with LPG as well as on petrol engines and has been used on many Holden 186 and 202 engines as a blow through manifold with a turbo charger.Many engines will respond to the use of a spacer between the manifold plenum and carburetor. Due to height restrictions and keeping the carburetor and air cleaner on most model Holdens under the bonnet the plenum height is lower than optimum for some engines.
The AS0002 red motor Holden manifold has a cast in plenum filler on the port floor, fuel drop out grid and a divided centre plenum divider. The manifold is 225mm wide at the widest point measured from the cylinder head face to the widest part of the plenum.
Due to the runner size and large plenum we decided to cast the plenum pig as part of the manifold, we have yet to see a Holden 6 perform better without it.
Manifold width from the head to the widest part of the carb pad is 225mm
The manifold has one x 1/4 npt vacuum take off on the rear of the manifold for brake vacuum and auto transmission fitting. AS0574 is an adapter that can be purchased separately and fitted to mount a 2 Holley 350 or 500 2 barrel carbs to the AS0002 in either front to back or in the sideways position