Bare Small Block Chev 327-350-400 186cc Aluminium Cylinder Heads with 67cc Chamber (Pair)

2.00" x 1.20" Intake Port, 1.42" x 1.53" Exhaust Port

The Aeroflow Series of Aluminium Cylinder Heads are taking affordable performance street and strip cylinder heads to the next level. These heads utilise ultra-smooth A356-T6 aluminium castings, new as-cast runner and chamber designs produce excellent flow numbers. This combined with a 5-angle competition valve job, diamond-honed bronze guides, hand bowl blending and professional assembly help to outperform some of the best brands in the business.

The Aeroflow Performance small block Chevy cylinder heads are designed for entry level street performance engines to give the ultimate in flow at a budget price. Made from A356 aluminium castings, the 186cc cylinder heads are ideal for operating in the idle to 6500 rpm range. These cylinder heads will fit a 4.00" bore and larger.

Head Specifications

Material:  A356 Aluminium
Chamber Chamber:  67cc
Intake Port Volume:  186cc
Intake Port Dimension:  2.00" x 1.20"
Exhaust Port Volume:  72cc
Exhaust Port Dimension:  1.42" H x 1.53" W
Spark Plug Location:  Straight
Intake Valve Diameter:  2.02"
Exhaust Valve Diameter:  1.60"
Valve Stem Diameter:  11/32"
Valve Spring Pocket I.D.:  1.49"
Valve Guide Material:  Manganese Bronze
Valve Guide O.D.:  .530" (.570" at base)
Rocker Stud Thread Size:  7/16" x 14
Valve Angle:  23°
Deck Thickness:  .625"

Suggested Components

Head Gasket:  Fel-Pro 1003
Intake Gasket (1.20 x 2.00 Port Size):  Fel-Pro 1204
Exhaust Gasket (1.34 x 1.39 D Port Size):  Fel-Pro 1406
Head Bolts:  ARP 134-3601 or 134-3701
Head Studs:  ARP 134-4001 or 234-4301
Spark Plugs (14mm x 3/4" reach with flat gasket seat):  Champion RC9YC

IMPORTANT NOTICE:

We recommend to check installed spring seat pressure & open pressure before installing your cylinder heads to make sure the spring pressure is correct for your application.