Product Description:
Finally, an improved cast reproduction of the factory type 616 cylinder head. No more fixing cracks and modifying 50+ year old heat cycled original heads that will probably just crack again. These new castings solve the 356/912 cylinder head problem with a replacement that looks and performs better than the original. Price is per pair.
Our newest heads are made to replace all stock 356 and 912 heads for improved power and performance. Can be used with OEM type, "torquer" type and "high rpm" type cams for increased performance over the entire rpm range. The intakes have an 18 cfm increase over our previous heads and a 30 cfm increase over OEM 912 heads!
They have improved fins for better cooling and a larger manifold flange with a matching gasket for our new WR Weber Intake Manifolds for 40 and 44 IDFs. This larger flange also supports any stock 356 intake manifold including Solex 40P11, Zenith, or early Solex 32s an 40s.
These are the absolute best replacement heads you can buy for the 356 and 912 engine and will finally let your 1720cc-1950cc engine realize its full potential.
***NOW with 40mm intake valves!****
Features:
- Cast just like the original heads but using a proprietary alloy and heat treat process that will not crack. The prototypes were extensively tested on the WR engine dyno and on the street. The flow through finning allows for cooling that is impossible with a CNC machined head.
- The smaller DR6EA plug is 12mm x ¾” reach and allows for much more material around the valves. It is a commonly used plug size and is easily available. Four new plugs are supplied with each set of heads.
- The stainless steel 8mm stem valves are 40mm intake and 34mm exhaust and are installed using a 5 angle valve job. The guides are silicon-bronze alloy for excellent heat transfer and long life. Port design is similar to original, but the use of the smaller valves and guides allows for improved flow (7% on intake, 3% on exhaust).
- Special bead lock chromoly retainers are matched to the double springs and are good for 7k RPM and lifts up to .525 without coil bind.
- The air injection bosses were retained to allow easy installation of a head temp sensor for EFI.
- The 61.0cc matched chambers have a 30-degree bevel cut to be compatible with the later factory and aftermarket piston and cylinder kits. Intake and exhaust ports are the larger SC and 912 version.
- Test on our in house Superflow 902S dyno shows an improvement over even the latest 356C/912 heads. Improvements compared to earlier heads will be more.
- Completely assembled and ready to install and run. The WR Standard Cylinder Heads are a perfect replacement for early and late 356 and 912 engines.
MADE IN THE USA
Fits:
Early and late 356s and 912s
Product Number:
616 104 301 WR
616.104.301.WR
616-104-301-WR
616104301WR
61610430100
