*** DUE TO NATIONWIDE BACKORDERS PLEASE ASK BEFORE PURCHASE AS THESE CASTINGS MAY NOT BE AVALIABLE AT THIS TIME***

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.

ProMaxx BBC 340cc CNC Ported (Bare Heads) 

Specs:

2.300"/1.880" valve sizes, 

121cc-127cc chambers(Your Choice) 

340cc Intake Runner

Flow Specs @ 28" w/2.300"/1.880"  w/30* Backcut valves 

          .200"   .300"   .400"   .500"   .600"   .700"   .800"   .900"

Intake    172     267     318     358    383     398     409     413

Exhaust   139     190     236    265     285     300     304     307

LISTED PRICE LISTED IS BARE SET

Add $500 for Assembled Heads for Flat Tappet cams up to.650" lift:

Stainless Steel Erson Competition Series 2.300"/1.880" Valves 11/32"

Erson 3425 Dual 1.460" Springs 125lb @ 1.900" / 415 @ 1.250" .650" max lift

Erson Steel Retainers, 7* Locks,7/16" Rocker Studs, 3/8" Guide Plates, Viton Seals

Add $600 for Assembled Heads for Hyd. Roller cams up to.650" lift:

Stainless Steel Erson Competition Series 2.300"/1.880" Valves 11/32"

Erson 3600 Dual 1.540" Springs 180lb @ 1.950" / 500 @ 1.300" .700" max lift

Erson Steel Retainers, 10* Locks,7/16" Rocker Studs, 3/8" Guide Plates, Viton Seals

Add $800 for Assembled Heads for Solid Roller cams up to.780" lift:

Stainless Steel Erson Competition Series 2.300"/1.880" Valves 11/32"

Erson 3870 Dual Cyloy 1.625" Springs 235lb @ 2.00" / 680 @ 1.300" .780" max lift

Erson Titanium Retainers, 10* Locks,7/16" Rocker Studs, 3/8" Guide Plates, Viton Seals