Why the Stainless Header Style Manifold?
Exhaust pulse interference with other cylinders is not just reduced, it is flat eliminated.  All pulse directions experience “softer” changes in finding their way to the turbine by the more uniform tube cross sections and gentle bends, thus keeping the pulse velocities as high as possible for their pending blast into the turbine.   Nothing makes for great changes, not even this beautiful manifold.  However, take a look around, what sort of exhaust manifolds do you see on real racing machinery?  You probably won’t find a cast log style manifold, and certainly not one without a “directed pulse” feature. 

Will this manifold make more power? 
We’ll be happy with 3 to 5 percent. It is soon to be run on the Dyno.

Turbo Position?
Lowering the centerline of the turbo by about four inches gave us the opportunity to straighten up the downpipe and gain a little easier exhaust gas flow as a result.  No great shakes for power, probably only another percent or two. 

Underhood Heat?
This has never been a problem, but is even less so with the S4.  The lower mass of the stainless header, even if operating at the same temperature, means reduced heat.

Performance?
I urge you to recall, we have often stated that maximum power is not our objective.  Too many short timer engines have made enormous power by boost alone. Not my cup of tea.  Please keep in mind, that our objective is absolutely to achieve the maximum power per psi of boost.  That is exactly where our bragging rights will be focused.  We are producing the most powerful systems ever devised for 5 psi boost.  Same for 6, 7, 8 psi, ................. and wherever your desires will take your objectives.   Power per psi is the magic number.  Rather obvious, it is also the most durable power number for any given power level as our systems will achieve your objectives at the lowest possible boost pressure.

We are doing this by re-engineering many of the details for even small power gains?
It is urgent to keep in mind that a two or three percent gain in some specific area is not of great significance on its own, BUT, do this three, four, eight, or ten times and a winning system  becomes obvious to all.  That is exactly what we are doing, and the S4 is a key part of that progress.

The S4 has all of the many features offered in the S3.  Your choice of T25/28 Ball Bearing Turbo, with/without fuel systems, choice of materials for the downpipe,  three different size intercoolers ,,, essentially, an endless number of choices.   Configure the system around your particular needs, we are delighted to build what you want to own.

The S4 is one more reason why the BEGi “quality of design” is superior to ALL others.

The system will be ready to ship about mid-September. Quantities are limited. We do not intend to build more than 50 systems a year.

Click on pictures to enlarge