to take in air and fuel is critical port flow valve size the ability to handle ... built in the cost of professional porting and modification of stock heads can ... often exceed the price of a brand new set of s&s super stock heads ... are available as a performance upgrade for a wide variety of stock harley-davidson ... ® engines as well as for replacement parts for s&s and flathead powertm engines ... aided design techniques all s&s parts are designed and built first as 3-d ... capability dimensionally correct parts can be produced in plastic from the 3-d ... cutting edge design methods we fast-forward the development of our cylinder heads ... ahead of the game when it comes time for real world testing 8 state of the art ...
performance replacement cylinder heads for small displacement 1984 99 big twin ... displacement sometimes in our quest for more and more performance we don t pay ... enough attention to the guys who for one reason of another don t feel the ... like everyone they want to get the most for their money more than likely they re ... of having the stockers rebuilt and ported tailored for stock displacement engines ... performance replacement cylinder heads for 1984 99 big twins these new s&s heads ... be an out of the box replacement part for smaller displacement engines and to ... heads sport only one s&s logo perfect for a sleeper hog combustion chamber the ... and about 11:1 in a 96 the intake ports are the same size as the ports on stock ... flow manifold is installed the exhaust ports are also stock diameter and are ...