MOFOCO 042 BIG VALVE CYLINDER HEAD---BARE

More high detail pictures available further down the page.

The sweet spot between horsepower and efficiency, Mofoco 042s are rated as the highest flowing as cast round port heads available.

VW cylinder heads are the best "bang for your buck" on increasing horsepower in your Volkswagen engine. This is because horsepower comes primarily from two things:

- the size of the engine itself
- and the air flow, port velocity and valve size of the heads

Engine size can't be changed without installing larger pistons and barrels or a stroker crank... but, new VW cylinder heads can be changed without splitting the engine case.

Featuring 40mm stainless steel intake valves and 35.5mm stainless steel exhaust valves, 042s are the sweet spot between horsepower and efficiency on vw engines from 1600cc to 1914cc.

After 20+ years of success, the 042's have been upgraded for more flow as cast, no step 55cc combustion chambers for maximum quench, more airflow through the head for maximum cooling, added material so boring for 94mm cylinders won't break through to the fins and now come standard with chromoly retainers. With the intake port volume at 62cc, the port velocity is perfect for a street performance cylinder head.

Mofoco 042 Flow Numbers---Tested at 25" with an IDF manifold

Lift                       Intake                 Exhaust

.100                      49                         48

.200                      91                         80

.300                     120                       100

.400                     134                       114

.500                     145                       120

.600                     152                       122

Cast at Eck Industries in Manitowac, Wisconsin

Machined in-house completely by Mofoco

This means the 042 is manufactured 100% in the United States... from the raw materials to make the casting, all the way to the final product to be installed on your engine. These 042 heads are not simply rebuilt off Brazil castings or made in China.

Detailed specifications for the MOFOCO 042 Cylinder Head:

• Approved for unleaded, plain old gas station fuel!
• Also safely runs with leaded, aviation, and racing fuels without modification
• 40mm Stainless Steel Intake Valve
• 35.5mm Stainless Steel Exhaust valve
• 55cc Combustion Chambers
• Chromoly Retainers
• Heavy Duty Springs
• Larger & Smoother Port Design for Better Flow
• Thicker Port Walls & Larger Intake Face
• 14mm 3/4 Inch Reach Spark Plugs
• Silicon Brass Valve Guides
• Three Angle Valve Job
• More Cooling Fins than the competition - Thicker & Stronger
• Thicker Combustion Chamber Ceiling
• Standard Bore - larger sizes available
• Machined on CNC-NC Milling Machines

Mofoco 042 heads come standard to fit stock 85.5 Cylinders. If you would like a larger bore please specify the size you need when placing your order below.

Note: These heads are priced individually. It is strongly recommended you purchase a pair for optimal performance.