The Aussie speed Holden V8 tunnel ram manifold suits red, black, blue motor cylinder heads some extra drilling will be required to suit the 3 different styles of Holden 253 and 308 red, black, blue motor cylinder heads. The centre valley cover holes are semi drilled on the underside for all 3 models.
THE TUNNEL RAM BASE IS 150mm high from the top to the bottom of the manifold sitting flat on a bench
The Aussiespeed Holden V8 Tunnel Ram manifold offers interchangable tops
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