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How can you tell if you are seeing an add
for cheap Chinese heads?
Lets look at the differences between

AFD and procomp/ speedmaster

008
009
006
005
004

Air Flow Dynamics small block ford heads

AFD is a Australian company owed by David Webb.
These heads prove to be the most power producing heads for the $$.

4V heads


These are not Procomp/ Speedmaster!
Procomp’s have a brass press in plug in the end.

 

Intake port

All 4V heads work with any 4V intake manifolds.

The intake port of the head has a filled floor to reduce port volume.

You can either fill the bottom of a OEM 4V intake manifold port

or port out the bottom of the head if you want the port to

have an exact match.

Or buy the AFD 4V intake.

 

Exhaust port can use 2V or 4V headers

 

64cc combustion chambers standard price as small as 48cc for an extra $185

 

Intake port volumes 220cc 4V

 

Intake valve sizes 4V 2.19  11/32 valves

 

Exhaust valve sizes 4V 1.71  11/32 valves

 

Head flow 4V street  347 IN 221 EX
sp4vs_flow_graph

 

Bare heads out of stock $1350 plus shipping
When available!

 

out of stock $1950 stage 1 plus shipping
Heads complete
setup for under .600 lift camshaft, fully blueprinted.
Stainless steel swirl polished valves, HD springs
130# seat 330# open, 7 degree moly retainers and moly locks.

 

out of stock $2100 stage 2 plus shipping
Heads complete
setup for hyd roller or solid flat tappet
under .650 lift camshaft, fully blueprinted
High Quality Stainless steel swirl polished valves,
HD springs 160# seat 380-400# open,
10 degree moly retainers and moly locks.

 

out of stock $2400 stage 3 plus shipping
Heads complete setup for solid roller under .700 lift camshaft, fully blueprinted. Manley stainless steel swirl polished valves, HD springs 200-250# seat 580-700# open, 10 degree moly retainers and moly locks.

 

2.6 -3.0 CNC ported heads bare out of stock $2300

 

Single plane Cleveland intake $365

 

AFD tall single plane $700

 

Dual plane Cleveland $310

 

Add bigger solid roller cam springs up to $200

 

Add titanium 10 degree retainers up to $220

 

Open up intake port to allow for standard 4v intake start at $120

 

Porting bowl blend $400

 

ARP studs and guide plates add $90

 

Comp cams roller rockers CCA-1045-16 $300

 

Plug kit for heads $12

 

Email for a custom quote.