Promaxx Shocker 340 BBC CNC Cylinder Head

  • Image 1
  • Image 2

Product Description

The Shocker CNC 340cc BBC is a professional designed cylinder head using the latest CNC porting tools. These heads out flow the competition at a price that cannot be touched. Some comparable heads are double the cost of one Shocker 340 CNC. Flowing over 415 cfm, this head is on top of the heap. Now go out and shock the competition.

  • 340cc full CNC Intake runner
  • Full CNC exhaust and combustion chamber
  • Ultra-smooth 356-T6 aluminum casting
  • Flows over 415 CFM
  • .750 deck thickness
  • 24° Intake/ 15° Ex valve angle
  • Diamond honed guides
  • CNC’d in the USA
  • Multiple spring options
  • 5 angle valve job
  • Professional Assembly
  • Machined and Assembled in the USA
  • Assemblies include: 21-4N 1pc swirl polished back cut valves, 7/16 studs and guide plates

Combustion Chamber ……121cc
Weight …………………………78.00 lbs.
Intake Runner ……………. 340cc
Exhaust Runner …………..135cc
Intake Valve Size ……….. 2.300
Exhaust Valve Size …….. 1.88”

Spring Pressure

Hydraulic Roller .600 max lift
Closed ………………….. 135 lbs. @ 2.000”
Open ……………………. 365 lbs. @ 1.400”

Solid Roller .700 max lift

Closed ……………………  230lbs. @2.000”
Open …………………….. 600 lbs. @ 1.300”

 Solid Roller .900 max lift

Closed …………………… 332 lbs. @ 2.100”
Open …………………….. 950 lbs. @ 1.200”

******* other options available******
Valve Guide ……………Manganese Bronze
Valve Seal Material … Viton
Retainer Material ……Steel
Valve Job ……………… 5-angle
Head Bolts……………. ARP 135-3703 Mark IV/ 135-3707 Mark V
Head Studs ………….. ARP 235-4713
Valve Angle ………. 24/4 intake 15/4 exhaust
Valve Seats ……………Hardened Steel
Intake Gasket ………. Fel-Pro  1275(may require slight trim)
Exhaust Gasket ……. Fel-Pro 1412
Head Gasket ……….. Fel-Pro 1047 Mark V and Mark VI /  1017 Mark IV
Spark Plug …………. .750” Reach Gasket Seat
Torque specs ……..   80 Ft lbs. 3 increments using 30wt oil
Exhaust port ………. Raised .375

 

PART # BRIEF DESCRIPTION PLUG TYPE CHAMBER SIZE VALVE SIZE MAX LIFT

 

9340 340 BBC Bare   121 2.300/1.88  
9341 340 BBC Assy   121 2.300/1.88 .600 Hyd
9342 340 BBC Assy   121 2.300/1.88 .700 Solid Roller
9342T 340 BBC Assy   121 2.300/1.88 .700 Solid Roller Ti Retainers
9343 340 BBC Assy   121 2.300/1.88 .900 Solid Roller Ti Retainers

 

           

 

 

 

Flow Data @ 28″ water              
lift 200 300 400 500 600 700 800 900 1.00
Int 177 271 323 365 387 400 412 415 417
Ext 148 195 243 270 289 307 310 312 315

Product Reviews

Write Review

This product hasn't received any reviews yet. Be the first to review this product!

$1,849.00
Quantity:
SKU:
9340
Shipping:
Free Shipping