BBC 5.0" Bore Space Racing Cylinder Head
Race Winning Performance out of the box...

Fits CN Billet 5.0" Bore Space Block PN 1051
Pro-Stock Port Design promotes high intake port velocity

54cc Combustion Chambers allow lighter pistons, more compression and better combustion
Concentric head bolt pattern

12 Degree Hi-Flow Valve Angle Design

The "Pro-Filer" 5.0" bore spaced cylinder head has all the features of our 4.9" version and more. This head is precision ported, has proven performance, and is ready to go straight out of the box. But it has one other important feature - a concentric head bolt pattern that assures 100% sealing and allows the head to be pulled off without the agonizing removal of the intake.

Technical Details

Material - A356 Primary Ingot Aluminum
Valve Angle - 12 Degree
Intake Ports - 470cc
Exhaust Valve - 1.80 to 1.90"
Intake Valve - 2.450" to 2.525"
Combustion Chamber - 54cc
Deck Thickness - Approx 3/4" deck for Nitrous and Blown applications
Spark Plugs - Use Gasketed 3/4" Reach Plugs
Valve Train - Uses T&D or Jessel Shaft Mounted Rocker Systems
Bore Spacing - 5.0" (Chuck Nuytten Billet Engine Blocks pn 1051)
Valve Guides - Bronze
Valve Seats - Copper Alloy
Intake Port Design - Pro-Stock Modified Oval Port
Intake Manifold - Use Pro-Filer Weld Kit
Valve Covers -Pro-Filer PN 168-B
Rockers - Shaft rockers (T & D, Jesel)
Valve Springs - Up to 1.625" Dia
RPM Range - 4500-9500 RPM

Part Numbers


166 Series 5.0" Bore Space 12deg 470cc Spread Port Cylinder Head
	PN	Description	Price	Qty
	166	5.0" Bore Space 12deg 470cc Spread Port Cylinder Single Head - Raw Casting	$1125.00 ea
	166-01	5.0" Bore Space 12deg 470cc Spread Port Cylinder Single Head - Machined Only	$1300.00 ea
	166-02-5	5.0" Bore Space 12deg 470cc Spread Port Cylinder Single Head - Copper Alloy Valve Seats & 5/16 Bronze Guides	$1785.00 ea
	166-02-11	5.0" Bore Space 12deg 470cc Spread Port Cylinder Single Head - Copper Alloy Valve Seats & 11/32 Bronze Guides	$1785.00 ea
166 Series 5.0" Bore Space 12deg 470cc Spread Port Cylinder Head SOLID - No Water Passages
	PN	Description	Price	Qty
	166S	5.0" Bore Space 12deg 470cc Spread Port Cylinder Single SOLID Head - Raw Casting	$1225.00 ea
	166-01-S	5.0" Bore Space 12deg 470cc Spread Port Cylinder Single SOLID Head - Machined Only	$1400.00 ea
	166-02-5-S	5.0" Bore Space 12deg 470cc Spread Port Cylinder Single SOLID Head -Copper Alloy Valve Seats & 5/16 Bronze Guides	$1885.00 ea
	166-02-11-S	5.0" Bore Space 12deg 470cc Spread Port Cylinder Single SOLID Head -Copper Alloy Valve Seats & 11/32 Bronze Guides	$1885.00 ea

166 Series Cylinder Head Accessories
	PN	Description	Price	Qty
	IR255060KF	Cometic Single Intake Gasket for 166 & 165 Series Heads Qty 2 required for new installations (replaces PN 166-IG)	$8.06 ea
	EX383064AM	Cometic Single Exhaust Gasket for 166 & 165 Series Heads Qty 2 required for new installations (replaces PN 166-EG)	$8.50 ea
	VC058094KF	Cometic Single Valve Cover Gasket for 166 & 165 Series Heads Qty 2 required for new installations (replaces PN 166-VCG)	$21.64 ea

updated 6/12/07

Pro-Filer Performance Products
PO Box 217
New Carlisle, OH 45344
937-846-1333
info@profilerperformance.com

BBC 5.0" Bore Space Racing Cylinder Head Race Winning Performance out of the box...

BBC 5.0" Bore Space Racing Cylinder Head
Race Winning Performance out of the box...