Buy Dart BBC 355cc CNC Pro-1 Head 19574136 121cc R/P 2.30/1.88 Assembled, Model DRT19574136 online. Engines and Components,Engines And Components
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CNC-Ported Pro 1 Cylinder Heads for Big Block Chevy
Championship-winning technology in an affordable package. Aluminum heads feature 2° rolled valve angles, .300" raised exhaust ports and fast-burn combustion chambers. Available in five different intake runner volumes for a wide variety of applications, heads are also offered in fully CNC-ported versions to maximize performance. Bare castings have multi-angle valve job and bronze valve guides. Assembled versions have extra long valves, springs, retainers, locks, and seals. Sold individually, bare or fully assembled.
Brand | Dart |
Part Number | 19574136 |
Product Line | Pro 1 CNC |
Assembled/Bare | Assembled |
Chamber Volume | 121 cc |
Plug Angle | Straight |
Intake Runner Volume | 355 cc |
Exhaust Runner Volume | 138 cc |
Intake Port Shape | Rectangle |
Intake Port Location | Stock |
Intake Port Height | 2.500 in |
Intake Port Width | 1.760 in |
Exhaust Port Shape | Round |
Exhaust Port Location | Raised |
Exhaust Port Raised Distance | 0.300 in |
Exhaust Port Height | 1.740 in |
Exhaust Port Width | 2.000 in |
Exhaust Port Bolt Pattern | Stock |
Intake Valve Size | 2.300 in |
Intake Valve Included | Yes |
Intake Valve Material | Stainless |
Intake Valve Length | 5.505 in |
Exhaust Valve Size | 1.880 in |
Exhaust Valve Included | Yes |
Exhaust Valve Material | Stainless |
Exhaust Valve Length | 5.435 in |
Valve Spring Included | Yes |
Valve Spring Diameter | 1.625 in |
Valve Spring Number | Dual |
Valve Spring Damper | Yes |
Valve Spring Retainers Included | Yes |
Valve Spring Retainer Material | Titanium |
Valve Locks Included | Yes |
Valve Lock Material | Steel |
Valve Lock Angle | 10 Degree |
Valve Seal Included | Yes |
Valve Seal Style | Positive Stop |
Rocker Studs Included | Yes |
Rocker Stud Size | 7/16-20 in |
Pushrod Guide Plate Included | Yes |
Guide Plate Pushrod Size | 3/8 in |
Valve Guide Included | Yes |
Valve Guide Material | Bronze |
Perimeter Mount Valve Cover | Yes |
Valve Seat Included | Yes |
Intake Valve Seat Material | Powdered Metal |
Exhaust Valve Seat Material | Powdered Metal |
Valve Seat Finish | Machined |
Combustion Chamber Finish | As Cast |
Intake Runner Finish | As Cast |
Exhaust Runner Finish | As Cast |
Intake Valve Angle | 24 Degree |
Exhaust Valve Angle | 15 Degree |
Accessory Bolt Holes | Drilled and Tapped |
Material | Aluminum |
Color | Natural |
Finish | Natural |
Quantity | Each |