The Type 4 engine platform is a very robust air cooled engine platform. Primary used in the porsche 914, customers today, having interest to bring there 914 back to life.

A vary popular engine, is the 71mm X96mm big bore. A very low cost combination, that can bring years of fun. One big problem with the type 4 engines was the cylinder heads. The cylinder heads were known to drop valve seats, resulting in engine failure. Today, we recommend replacing the old type4 oem heads. Most of these oem heads have been used beyond there service life. Amc out of spain, makes a replacement type 4 head, that many companies sell and modify for performance use. These heads are a excellent  head for the type 4 engine. Dual weber carbs are the standard for most tpye 4 engines also.

There are also a wide range of stroker cranks, and piston combinations for the type 4 engine, opening up a wide range of build options. Do your home work, and build your engine for your application, street, race , or off road use.