 Sniper X 24 Degree CNC Ported Big Block Chevy Cylinder HeadsThe baddest head available for Conventional Port Rules
|
174X Series 24 Degree CNC Ported BBC Heads
|
The Sniper X cylinder head is the latest BBC head offered in the Sniper Series. Designed with the most up to date technology available, the Sniper X head flows over 460cfm on a 375cc runner and over 325cfm on the exhaust! We started with the most sound casting available and then spent months developing the best port and chamber for a 24º head.
All heads are 100% CNC ported including the chamber and features a 5 angle valve job. The Sniper X uses standard BBC parts; Jesel, T&D, Stud mounted rockers; .350 long intake valves; .100 long exhaust valves; and standard pistons.
When your ready to put your 565ci or larger BBC up against the world, the Sniper X head is for you.
Air Flow
| Lift | Intake | Exhaust |
| 0.200 | 156 | 128.3 |
| 0.300 | 234 | 170.6 |
| 0.400 | 306 | 205.2 |
| 0.500 | 368.4 | 236.7 |
| 0.600 | 414 | 298.3 |
| 0.700 | 451.2 | 313.6 |
| 0.800 | 468 | 321.3 |
| 0.900 | 477 | 327.4 |
| 1.000 | 481.2 | 332.2 |
| Avg | 372.9 | 259.3 |
Sniper X Specifications
Material: Aerospace Specification, A356 Aluminum Alloy (Primary Virgin Ingot)
Valve Angle: 24 Degree (rolled two degrees)
Intake Ports:Rectangle-Shaped, Fully CNC 375cc
Intake Port Design - Modified Oval Port located .485 - .490 off deck (stock)
Intake Port Flow: 375cc = 481 cfm @1.000
Combustion Chamber: CNC - 119cc (Milled 105cc)New design to promote wet-flow and efficiency!
Valve Spring Pocket: 1.625" Maximum (no deeper)
Bore Spacing: Standard BBC 4.840
Exhaust Valve: Std Location 1.800" - 1.850" / +.100 long
Intake Valve: Std Location 2.350" / +.350 long
Deck Thickness: 1/2" deck for Nitrous and Blown applications
Spark Plugs: Revised location to improve flame travel. Use Gasketed 3/4" Reach Plugs NGK R5671A-7 or colder.
Valve Job: 50 Degree High Performance
?
Valve Guides: Maganese Bronze Alloy .502" OD
Valve Seats: Steel (Standard) or Copper Alloy.
Valve Train: Uses Stock Style stud mounted or Jesel/T&D bolt on.
Engine Size Recommendation: 565+ / 8500 RPM
Application: High Performance (i.e. strip/marine).
Pistons: Uses Standard BBC Pistons
Head Bolts/Studs: Requires 1" longer head bolt next to exhaust ports.
Intake Manifold - All conventional manifolds will bolt right up (Some port matching may be required).
Accessories - Heads drilled and taped for standard accessories (alternator)
Parts and Accessories
Intake Manifold: Pro-Filer Sniper Jr. Single Plane, Sniper Single Plane or Sniper Tunnel Ram
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 - Requires 1" longer than stock bolts by exhaust ports.
