BB Chevy Hemi
Nick Arias Jr. Racing Components reintroduces its Big Block Chevy Hemi® cylinder head for Mark IV series blocks. The Arias BB-AH head kit will easily adapt to most 10.200” and 11.200” deck G.M. factory or aftermarket blocks, with a few minor modifications.
Arias Jr’s cast aluminum Big Block Chevy Hemi head is poured from 356 T-6 alloy and features full water jacketing throughout. Extra thick decks boost combustion sealing and prevent coolant seepage. The notorious three-pushrod design has been reengineered to a more conventional setup, with one intake and one exhaust pushrod activating new needle bearing, roller tipped rockers.
This bolt-on or complete Crate Engine package is ready for the street rodder having the desire to stand out from the crowd; or the hardcore racer looking for the power and torque of a genuine Hemi® for their Rat Motor foundation. This is the same cylinder head that dominated Drag cars & Boats and Tractor pullers for the last four decades, with today’s technology built in. Bolt on a piece of Hemi history today!
Part# 101120-002-01 – Water jacketed, assembled (pair): $11,999.00
Part# 101120-001-01 – Solid, bare, with seats & guides (pair): Call
- Fully machined 156cc hemisphere chambers
- High-efficiency ports flow up to 414 cfm for intake and 311 cfm exhaust @ 28”, out of the box.
- 456 cfm intake and 386 cfm exhaust with “Race Option” porting. Excellent low to mid-lift flow
- Stainless steel 2.375” intake and 1.940” diameter exhaust valves come standard. Titanium and Inconel valves optional
- Manganese bronze valve guides
- Heat treated ductile iron valve seats
- Can accept valve springs up to 1.710” diameter, based on application requirements
- Tool steel springs standard with custom race springs optional
- Shaft style roller rocker arm assemblies with rocker oiling through the pushrods like stock Big Block
- Investment cast 4340 steel roller-tip rocker arms with dual needle bearings and H-13 lash adjusting screws
- Cast aluminum finned valve covers supplied with breathers, oil fill caps, o-ring seals, spark plug tubes and hardware. Choose either black wrinkle, hi-luster polished, carbon fiber or plain finish
- NA Jr. Pushrod set
- NA Jr. ARP head stud, nut, washer kit
- NA Jr. COMETIC head gasket set
- NA Jr. Oil drain back line kit
- NA Jr. Hemi header flanges & hardware
- NA Jr. Water Necks (2)
- NA Jr. Water block-off plates (2)
- NA Jr. Intake & exhaust gaskets
- All related fasteners
- ARIAS Hemi piston kit
- NA Jr. intake manifold (carburated/e.f.i. tunnel-ram or supercharger)
- NA Jr. oil drain back bungs
- NA Jr. billet valley cover kit
- NA Jr. billet carburetor/injector hat/throttle body manifold adaptors
- NA Jr. thermostat log, cast
- Milodon Oil pan with oil drain back bungs