Sniper 24 Degree Big Block Chevy Racing Heads

Hitman 12 Degree Spread Port Big Block Chevy Cylinder Heads

Starting at
$2461.00 Each

Series P/N: 184 (QTY & OPTIONS ADDED TO BASE PRICE AT CHECKOUT)

  • Accepts up to 1.650 O.D. Springs
  • Bronze valve guides reduce stem wear
  • Pro-Stock Port Design promotes high intake port velocity
  • 60cc Combustion Chambers allow lighter pistons, more compression and better combustion.
  • Made in the U.S.A.
Hitman Big Block Chevy Heads by Pro-Filer

The Hitman BBC 12° Spread Port Head takes the guess work out of trying to find the right cylinder head for the most power. Based on Pro-Stock technology, the Hitman offers an out-of-the-box port design that allows any racer or engine builder to have an efficient, high velocity airflow cylinder head within their grasp. Providing you with power over your opponents.

The Hitman Series cylinder heads feature a heart shaped combustion chamber, an oval-shaped port design that is available as a proprietary PRECISION As-Cast or Fully CNC version, and the unmistakable Pro-Filer casting quality.

Series P/N: 184 Configuration Options


Qty
Intake Port Size
Chamber Size & Finish
Valve Guide Size
Casting Style
Spring & Retainer Options

Your choice of 415cc or 470cc Intake ports with 60cc N/A, 72cc or 74cc Nitrous Friendly Chambers.

  • Copper Alloy Seats Included
  • Your Choice of 5/16 or 11/32 Guide Dia.
  • Valve Job (Int/Exh): 2.400/1.850 Included
Starting at
$2461.00 Each

Series P/N: 184 (QTY & OPTIONS ADDED TO BASE PRICE AT CHECKOUT)

Details


Series P/N: 184 BBC Hitman Head Specifications

Material:Aerospace Specification, A356 Aluminum Alloy (Primary Virgin Ingot)
Valve Angle: 12 Degree valve angle
Intake Ports: Spreadport Location Oval-Shaped, PRECISION As-Cast 415cc & 470cc Pro-Stock Modified Oval Port
Exhaust Valve Diameter:1.850" - 1.880", 6.800" long (2.200 install)
Intake Valve Diameter:2.400"-2.450" - 6.800 long (2.200 Install)
Deck Thickness:1/2" deck for Nitrous and Blown applications
Valve Guides:Manganese Bronze to assist in extending valve life
Bore Spacing: Standard BBC 4.840"
Spring Pocket:Maximum of 1.655 (no deeper)
Valve Seats: Copper Alloy
Combustion Chamber: Heart-Shaped, As-Cast/CNC - 60cc (CNC 72cc & 74cc Power Adder)
Milling: .0050 per cc flat milling, .007 per cc angle milling
Spark Plugs:Revised location to improve flame travel. Machined for a gasketed 3/4" reach plug NGK R5671A-7 or colder
Valve Covers: Uses Pro-Filer PN 190
Valve Train: Shaft rockers (T & D, Jesel)
Engine Size:565+ cid / 9000 RPM
Application: High Performance (i.e. street / strip / marine)
Intake Manifold:Profiler Hitman Series 208 Single Plane or Hitman Series 187 Tunnel Ram

Air Flow Detail #184 BBC Hitman Spreadport Head - 415cc Runner

Pro Filer Hitman Spreadport Big Block Chevy Heads with 415cc Intake Runner, 2.400" Intake Valve and 1.850" exhaust valve. Flow data based on Cylinder #1 intake and exhaust port. Flow measured at 28" of depression.

Air Flow Detail #184 BBC Hitman 415cc Runner

LiftIntake CFMExh CFM% Exh/Int
0.200 165 137 83%
0.300 243 185 76%
0.400 313 226 72%
0.500 372 270 73%
0.600 423 294 70%
0.700 452 300 66%
0.800 455 306 67%

Air Flow Chart #184 - 415cc Runner

PN184 BBC Hitman 415cc Runner Air Flow Chart

Air Flow Detail #184 BBC Hitman Spreadport Head - 470cc Runner

Pro Filer Hitman Spreadport Big Block Chevy Heads with 470cc Intake Runner, 2.400" Intake Valve and 1.880" exhaust valve. Flow data based on Cylinder #1 intake and exhaust port. Flow measured at 28" of depression.

Air Flow Detail #184 BBC Hitman 470cc Runner

LiftIntake CFMExh CFM% Exh/Int
0.200 160 138 86%
0.300 239 182 76%
0.400 315 226 72%
0.500 385 275 71%
0.600 431 298 69%
0.700 458 307 67%
0.800 483 310 64%
0.900 500 320 64%

Air Flow Chart #184 - 470cc Runner

PN184 BBC Hitman 470cc Runner Air Flow Chart

Copyright © 2016 - Pro-Filer Performance Products

Scroll to Top