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Profiler Sniper X 174XC350493 - Cylinder Head Cast Aluminum Chevy Big Block 355cc 119cc 24 Degree 2.300" x 1.850", CNC Ported, Assembled w/ 1.437" springs for solid flat tappet/Hydraulic roller lifters

Profiler Sniper X 174XC350493 - Cylinder Head Cast Aluminum Chevy Big Block 355cc 119cc 24 Degree 2.300" x 1.850", CNC Ported, Assembled w/ 1.437" springs for solid flat tappet/Hydraulic roller lifters

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Profiler Sniper X 174XC350493 - Cylinder Head Cast Aluminum Chevy Big Block 355cc 119cc 24 Degree 2.300" x 1.850", CNC Ported, Assembled w/ 1.437" springs for solid flat tappet/Hydraulic roller lifters

The Profiler Sniper X cylinder head is the latest BBC head offered in the Sniper Series. Designed with the most up to date technology available, this Sniper X head flows over 430cfm on a 355cc 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 24° head.

All heads are 100% CNC ported including the chamber and features a 5 angle valve job with .350" longer intake valves and .100" longer exhaust valves. The Sniper X uses standard BBC parts including available Jesel and T&D shaft rockers or you can use standard stud mounted rockers. As an added bonus, the Sniper X maintains standard BBC valve centerlines so it works with regular BBC pistons.

When your ready to put your 565 cid or larger BBC up against the world, the Sniper X head is for you.

100% CNC Ported for Mega Flow
24 Degree OEM X275 Class Accepted Valve Angle
119cc Heart Shaped Combustion Chamber
2.300 Intake & 1.850 Exhaust Valves
Works with Standard BBC Pistons
11/32" Valve Stem Dia Available

Series P/N: 174X 355cc BBC Sniper X Head Specifications
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
Exhaust Port Shape:    Round, Raised Port, Fully CNC Machined
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 1.625" (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 - 2.300", Exhaust - 1.850"
Valve Stem   11/32" (PN 174-X-C35-03)
Valve Length:    Intake 5.525" (2.100" Install), Exhaust 5.540" (2.100"Install)
Deck Thickness:    1/2"
Valve Guides:    Manganese Bronze to assist in extending valve life .502" OD
Valve Seat:    50° - Ductile Iron Material
Valve Train:    Uses Stock or Most Aftermarket Rocker Systems (T&D P/N 3211-170/170)
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)
Engine Size:    355cc - 502cid + /8500 rpm
Application:    High Performance (i.e. strip / marine)