Pro Filer Performance Products
Sniper X 24° CNC Machined BBC Cylinder Heads, 355cc, Valve Jobbed, Each
Sniper X 24° CNC Machined BBC Cylinder Heads, 355cc, Valve Jobbed, Each
Regular price
$2,064.75 USD
Regular price
Sale price
$2,064.75 USD
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per
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General Description
Sniper X 24° CNC Machined BBC Cylinder Heads deliver maximum power and performance. Precision-crafted with 100% CNC-ported mega flow intake and exhaust ports, heart shaped chambers the Sniper X demonstrates greatness.
- Conventional Port Location, 100% CNC
- 119cc Heart Shaped Combustion Chamber
- 5 angle valve job, 50 degree
- 355cc recommended for 540cid / 8500 rpm
- 2.300 Intake & 1.850 Exhaust Valves
Overview
| Material: | Aerospace Specification, A356 Aluminum Alloy (Primary Virgin Ingot) |
| Valve Angle: | 24° valve angle to provide you with bolt on compatibility |
| Intake Port Volume & Shape: | Rectangle-Shaped, Fully CNC Machined 355cc |
| Intake Port Flow: | 355cc = 430cfm @.800 lift |
| Combustion Chamber: | CNC - 119cc (Milled 105cc) New design to promote wet-flow and efficiency! |
| Milling: | Angle - .0070" per cc Flat - .0050" per cc |
| Valve Spring Pocket: | Maximum of 1.650" (no deeper) |
| Bore Spacing: | Standard BBC 4.840" |
| Intake Manifold | All conventional manifolds will bolt right up (Some port matching may be required) |
| Pistons | Standard BBC Pistons |
| Head Bolts/Studs | Requires 1" longer than stock head/bolt or stud next to exhaust ports |
| Valve Diameter | Intake - (355cc) 2.300" Exhaust - 1.850" |
| Valve Length: | Intake +.400 long, Exhaust +.150 long |
| Deck Thickness: | 1/2" |
| Valve Guides: | Manganese Bronze to assist in extending valve life .502" OD |
| Valve Seats: | Steel (standard) or Copper Alloy |
| Valve Train: | Uses Stock or Most Aftermarket Rocker Systems (shaft mount recommended) |
| Spark Plugs: | Revised location to improve flame travel. Machined for a gasketed 3/4" reach plug NGK R5671A-7 or colder |
| Head Bolts: | Requires 1" longer head bolt next to exhaust ports |
| Accessories: | Heads drilled and taped for standard accessories (alternator mount holes) |
Flow Numbers
Pro Filer Sniper Big Block Chevy Heads with 370cc Intake Runner, 2.35" Intake Valve and 1.85" exhaust valve. Flow data based on Cylinder #1 intake and exhaust port. Flow measured at 28" of depression.
Air Flow Detail #174X BBC Sniper 355cc Runner
| Lift | Intake CFM | Exh CFM | % Exh/Int |
| 0.300 | 226 | 170 | 75% |
| 0.400 | 295 | 205 | 69% |
| 0.500 | 350 | 238 | 68% |
| 0.600 | 396 | 298 | 75% |
| 0.700 | 414 | 314 | 76% |
| 0.800 | 425 | 325 | 76% |
| 0.900 | 430 | 338 | 79% |
Air Flow Chart #174X - 355cc Runner
