BBC 4.9" Bore Space Racing Cylinder Head
Race Winning Performance out of the box...

• For GM Motorsports DRCE 4.9" Bore Space Block
  

• 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

This unique 4.9" bore spaced cylinder head uses the same ingenuity that powered Ray Franks to the 4th spot in NHRA, Speed-Pro, 200mph Club.

Already precision ported, there are no additional porting or modifications required or recommended, allowing for a true pro-style, out-of-the-box cylinder head.

This head is used in Outlaw Pro-Stock, NHRA Competition Eliminator, Tractor/Truck Pullers, Marine, Pro-Modified, Bracket Racing, Anywhere power is essential.

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 Jesel Shaft Mounted Rocker Systems
Bore Spacing - 4.9" GM DRCE Motorsports Blocks
Valve Guides - Bronze
Valve Seats - Copper Alloy
Intake Port Design - Pro-Stock Modified Oval Port
Intake Manifold - Use Pro-Filer PN 170
Valve Covers -Pro-Filer PN 168-B
Rockers - Shaft rockers (T & D, Jesel)
Valve Springs - Up to 1.625" Dia
RPM Range - 5500-9500 RPM

Part Numbers

165 Series 4.9" Bore Space 12deg 470cc Spread Port Cylinder Head
	PN	Description	Price	Qty
	165	Raw Casting	$1125.00 ea
	165-01	Machined Only	$1300.00 ea
	165-02-5	Copper Alloy Valve Seats & 5/16 Bronze Guides	$1785.00 ea
	165-02-11	Copper Alloy Valve Seats & 11/32 Bronze Guides	$1785.00 ea
165 Series 4.9" Bore Space 12deg 470cc Spread Port Cylinder Head SOLID - No Water Passages
	PN	Description	Price	Qty
	165S	Raw Casting	$1225.00 ea
	165-01S	Machined Only	$1400.00 ea
	165-02-5S	Copper Alloy Valve Seats & 5/16 Bronze Guides	$1885.00 ea
	165-02-11S	Copper Alloy Valve Seats & 11/32 Bronze Guides	$1885.00 ea
165 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)	$12.20 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	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

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