More high detail pictures available further down the page.
The sweet spot between horsepower and efficiency, Mofoco 042s are rated by Hot VWs magazine as the highest flowing unported 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; - bigger is always more horsepower;
- and the air flow 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.
Mofoco 042 VW heads are truly the "bread and butter" performance head. Featuring 40mm intake valves and 35.5mm exhaust valves, 042s are the sweet spot between horsepower and efficiency on vw engines from 1600cc all the way up to the two litre engines. The only head that makes more power is MOFOCO's own 050 Big Valve Head... and 050s are meant for the baddest of the bad, 2180cc or 2265cc engines set up for raw horsepower!
Admit it, you want to keep your VW highly streetable, but have a little somethin' in reserve for those big shots who think they have mighty cars... and this is precisely what 042s were designed for. Hot VWs magazine compared the airflow of Mofoco 042s to several other big name competitors' 042s, and MOFOCO took the cake on not only air flow, but with our extra cooling fin design, figuratively speaking, our 042 stayed cool while everyone else's were hot enough to cook up some breakfast on! We regularly build street performance engines in our engine shop, and time and time again our Mofoco designed 042 vw heads have been the customer head of choice.
With extra cooling fins, airflow to ideally match horsepower to efficiency, and designed based off of Volkswagen original castings, this is simply the single most cost effective bolt-on performance upgrade that anyone with basic mechanic skills can accomplish.
Cast 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
- 53cc Combustion Chambers
- The ideal street use VW heads
- Heavy Duty Springs
- Bolts right on in place of your old VW heads
- Aircraft Casting Technology from a foundry in Manitowac, Wisconsin
- Larger & Smoother Port Design for Better Flow
- Thicker Port Walls & Larger Intake Face
- 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. There will be a $20 charge per head for larger bores.
Note: These heads are priced individually. It is strongly recommended you purchase a pair for optimal performance.
Keep in mind that while Mofoco 042s are sized to fit virtually any engine setup above 1600cc, if all you are looking for is replacement heads for your street driven VW without looking for more horsepower, or if you have an engine smaller than 1600cc, Mofoco recommends our 041 VW Heads. Conversely, if you are looking for the baddest of the bad, highest horsepower possible and have a 2180cc or larger engine, the Mofoco 050 VW Head are the heads for you. For everyone in between, 042s are the head of choice. If you need guidance on which heads or other upgrades would be the best choice for your air cooled VW setup, call our team of VW specialists at 1-800-558-8955 or 414-963-1020 with the details and goals of your vehicle.