Pro-Filer Sniper BBC 24 Degree Cylinder Heads

Pro-Filer Sniper Big Block Chevy 24 Degree Racing Cylinder HeadsRace Winning Performance out of the box...· Accepts up to 1.625 O.D. Springs· End pads drilled and tapped for accessories· Bronze valve guides reduce stem wear· Made in the U.S.A. · · 174 Series 24 Degree BBC Heads
This is where it all began... a powerful, out-of-the-box cylinder head design matched with an outstanding, unbeatable aerospace casting technology. And we are here to tell you... It has only gotten better!
The Pro-Filer Sniper Series of BBC heads have proven over and over again that performance and power are the heart and soul of our product. From the high velocity, PRECISION As-Cast ports to the Fully CNC Ported Castings, Pro-Filer continues to deliver what you need to be the “Big Dog”! For larger then 320cc intake parts, please see our Sniper X CNC 24 Degree Heads.
320 cc Intake Port Model
Material: Aerospace Specification, A356 Aluminum Alloy (Primary Virgin Ingot)
Valve Angle: 24 Degree (rolled two degrees)
Intake Ports: Oval Shaped, Precision As Cast 320cc
Intake Port Design - Modified Oval Port
Intake Port Flow: 320cc = 395cfm @.800"
Engine Size: 454-540cid / 7500 rpm
Application: High Performance (i.e. street / strip / marine)
Combustion Chamber - Heart-Shaped/Fast-Burn,As-Cast/CNC - 119cc, can be reduced to 105cc
Milling: Angle - .0070" per cc Flat - .0050" per cc
Valve Spring Pocket - Maximum of 1.625" (no deeper)
Bore Spacing: Standard BBC 4.840"
Exhaust Valve: 1.880" - 1.900" / +.100" long
Intake Valve: 2.225" - 2.300" / +.250" long
Deck Thickness: 1/2" deck for Nitrous and Blown applications
Spark Plugs: Revised location to improve flame travel. Machined for a gasketed 3/4" reach plug NGK R5671A-7 or colder
Valve Guides: Manganese Bronze to assist in extending valve life .502" OD
Valve Train: Uses Stock or Most Aftermarket Rocker Systems (shaft mount recommended)
Valve Covers: Uses Standard Big Block Chevy
Head Bolts: Requires 1" longer head bolt next to exhaust ports
Valve Seats: Steel (Standard) or Copper Alloy
Accessories: Heads drilled and taped for standard accessories (alternator)
290 cc Intake Port Model
Material: Aerospace Specification, A356 Aluminum Alloy (Primary Virgin Ingot)
Valve Angle: 24 Degree valve angle to provide you with bolt on compatibility for stock accessories
Intake Ports: Oval Shaped, Precision As Cast 290cc
Engine Size: 396-468cid / 7000 rpm
Application: High Performance (i.e. street / strip / marine)
Intake Port Design - Modified Oval Port
Intake Port Flow: 290cc = 365cfm @.800"
Combustion Chamber - Heart-Shaped/Fast-Burn,As-Cast/CNC - 119cc, can be reduced to 105cc
Milling: Angle - .0070" per cc Flat - .0050" per cc
Valve Spring Pocket - Maximum of 1.625" (no deeper)
Bore Spacing: Standard BBC 4.840"
Exhaust Valve: 1.880" - 1.900" / +.100" long
Intake Valve: 2.225" - 2.300" / +.250" long
Deck Thickness: 1/2" deck for Nitrous and Blown applications
Spark Plugs: Revised location to improve flame travel. Machined for a gasketed 3/4" reach plug NGK R5671A-7 or colder
Valve Guides: Manganese Bronze to assist in extending valve life .502" OD
Valve Train: Uses Stock or Most Aftermarket Rocker Systems (shaft mount recommended)
Valve Covers: Uses Standard Big Block Chevy
Head Bolts: Requires 1" longer head bolt next to exhaust ports
Valve Seats: Steel (Standard) or Copper Alloy
Accessories: Heads drilled and taped for standard accessories (alternator)