SB Ford 289-351W Complete Heads 175cc (Pair)

The Aeroflow Series of Aluminium Cylinder Heads are taking affordable performance street and strip cylinder heads to the next level. Theseheads utilise ultra-smooth A356-T6 aluminium castings, new as-cast runner and chamberdesigns produce excellent flownumbers. 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 Ford Windsor cylinder heads are designed for street performance engines to give the ultimate in flow at a mbudget price. Made from A356 aluminium castings, the 175cc cylinder heads are ideal for operating in the idle to 6500 rpm range. The complete heads include larger then stock 1.46" diameter valve spring to handle .525" lift. Suits flat tappet camshaft.

Note: These heads are drilled for 1/2" head bolts. If using a 7/16" bolt, you must use a head boltbushing kit or step down head bolts.

Head Specs:

Chamber Volume: 60cc Chamber

Intake port volume: 175cc

Intake valve size: 2.02"

Exhaust valve size: 1.60"

Valve spring diameter: 1.460" (37mm)

Spring installed height: 1.73" @ 145lbs

Maximum valve lift: 0.575" (14.61mm) @ 315lbs

Rocker stud diameter: 7/16"

Pushrod diameter: 5/16" (width of slot in guide plate)

Spark plug style: Angled

Flow Chart cfm @ H2O

 .100" .200" .300" .400" .500" .600"

2.020 Intake 62 118.9 166.8 214.3 247.8 267.6

1.600 Exhaust 50 99.6 136.3 156.8 168.2 171.7