Pro-filer Oval Port Design BBC Aluminum Cylinder Heads On Sale Now $1995.00 Complete w/Manley Stainless Steel Valves, Nex Tek 1.640 Roller Springs & Titanium Retainers Fully Race Ready Assembled


BBC 24 Degree
Standard Port Cylinder Heads
174 Cylinder Head Intake View
  • Oval port design promotes high intake port velocity for killer torque output
  • Available in 290cc, 320cc and 350cc intake port sizes to cover all applications
  • End pads drilled and tapped for accessories, standard stud girdles and rockers fit!
  • Accepts up to 1.625 Springs

Sniper 24 Degree Heads are now available with CNC Porting for even more air flow!
Unbeatable unique casting technology along with unbeatable cylinder head design gives us the “Pro-Filer” BBC Standard Port 24 degree replacement cylinder head.Available in 3 different intake port sizes (290cc, 320cc and 350cc) we have made this head usable by anyone.

Ready to go, straight out of the box, the “Pro-Filer” BBC Standard Port solves every racers need of getting BIG power and BIG performance for little time and money.

Note: Flow rates may vary for any number of circumstances due to valve job, valves, the flow bench used, test parameters, etc.

Note: Flow rates may vary for any number of circumstances due to valve job, valves, the flow bench used, test parameters, etc.

Note: Flow rates may vary for any number of circumstances due to valve job, valves, the flow bench used, test parameters, etc.

Technical Details

Material: A356 Primary Ingot Aluminum
Valve Angle: 24 Degree (rolled two degrees)
Intake Ports: 290cc, 320cc, 350cc
Intake Port Design – Modified Oval Port
Intake Port Flow: 290cc = 365cfm @.800, 320cc = 395cfm @.800, 350cc=420cfm@.800
Combustion Chamber – 119cc, can be reduced to 105cc (.005 per cc flat milling, .007 per cc angle milling)
Valve Spring Pocket – 1.625″
Bore Spacing: Standard BBC 4.840
Exhaust Valve – 1.880″ – 1.900 / +.100 long
Intake Valve – 2.225″ – 2.300″ / +.250 long
Deck Thickness – Approx 1/2″ deck for Nitrous and Blown applications
Spark Plugs – Use Gasketed 3/4″ Reach Plugs NGK R5671A-7 or colder
Valve Guides: Bronze Alloy .562″ OD
Valve Train – Uses Stock or Most Aftermarket Rocker Systems (shaft mount recommended)
Valve Seats – Ductile Steel
Accessories – Heads drilled and taped for standard accessories (alternator)

Product Accessory Details

Intake Manifold: Pro-Filer Sniper II or Fabricated Sheet Metal
Intake Gasket: Special Pro-Filer Cometic PN IR250060KF
Valve Cover Gasket: Stock BBC
Exhaust Gasket: Stock BBC
Head Gasket: 4.54 bore Cometic C5433 or Fel-Pro 1017
Head Gasket: 4.60 bore Cometic C5434 or Fel-Pro 1057
Valve Covers – Standard BBC Bolt Pattern Pro-Filer PN 191
Rockers – Standard BBC or shaft rockers (T & D, Jesel)
Pistons: Most 24 Degree Aftermarket
Valve Springs – Up to 1.670″ Dia
Valve Spring Installed Height: Determined by Valve Height When Ordered
Head Bolts – Information Pending
Head Studs – Information Pending

Product Recommendations for Optimum Performance

Intake Manifold: Pro-Filer Tunnel Ram for 500cu in or greater, Pro-Filer Sniper II
Pistons: Wiseco
Nitrous Systems: NOS Nitrous Systems / Speed Tech
Bore Size: Optimized Bore of 4.50 and larger
Rocker Systems: Stock or Shaft Mount (Jesel/T&D) both available from Pro-Filer
Valves: Manley or Victory Valves – Stainless Steel

Part Numbers
Note: Copper Seats available by special order add $100. Manley or  Victory Titanium Valves also available, call for details.