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R & D refers to Research and Development. It is how we design and test systems to ensure real world performance.

For the front header heat shield, we recommend using a #24 hose clamp from your local auto parts store.

With enough carbon build up, yes it could reduce the flow rate by reducing the spacing between the discs. We do not recommend ceramic coating our discs for the same reason.

Keep in mind that...

188P/N 444-2503 is a weld on unit only.
Our 3 inch Disc Only units are the only Discs Only units that are clamp on.
4 and 5 inch Disc Only are weld on.
Most likely our 3 inch Disc Only unit would...

Our standard 2 inch disc screws allow installation of 1-20 discs.=P/N 404-7206
Our "Race" screws are 3 inches long and allow installation of 15-34 discs.=P/N 404-7306
You would want to consider...

In it's current state, try running 15-16 discs with a closed end cap. Then add 2-3 more discs when you go over to the 255 cam to better match the increase in flow from the cam.

I am sorry but none of our systems will work with your EVO motor with a kick start.

Yes there should be a #24 hose clamp that would install around the front head pipe, between the front and rear pipes, at the stock transmission mount point. Wrap the clamp around the stock bracket.

Here is our open end cap.
http://www.supertrapp.com/product_sections/detail.asp?CatID=69&ItemID=405-3046

For the performance benefit we recommend use of either the open end cap or the closed end cap. Yes the open end cap has a large hole and is conical in shape. For more sound the open end cap sounds...

Yes you can run a different amount of discs in each muffler. However you would want less discs on the left side of the bike and more in the right side. Left and right as your sitting on the bike.

The exhaust flow should be the same from either side. Same amount of discs should be used on both mufflers.

Have a look at our FAQ. This might give you some good insight to our disc technology.
http://www.supertrapp.com/resource/faqs.asp

sales@supertrapp.com is an email address you could send your pictures to.

Are using the open end cap or the closed end cap with the Fatshotz?

If you are still tuned for the Rush true duals and Jackpot slip-ons, that might be the cause of having less horsepower and torque as you described when switching to the Fatshotz. To increase bottom...

I am sorry to hear that. Our Stouts were designed and tested to work with the stock air/fuel ratio as well as aftermarket fuel management modules.

Our products are available. However there may not be an immediate availability due to demand. If not in stock, our products could take 6-8 weeks to produce.

The numbers you gave reference our muffler body which is used on the 2010-12 models as well as the earlier models. I was trying to determine which model you had. The core assemblies are different for...

If you feel fuel adjustment is required then there are other options for that as well. FuelMotoUSA.com offers great tech support with the fuel tuners they sell. They also are very familiar with our...

The SuperTrapp Stout core assembly from the 2010-2012 model is
P/N 041-6524
These would need to be ordered through us directly whether by your local dealer or yourself.
Customer Service...

Also what is the part number for our slip-ons. I still would like to know which model of our Kerker Stouts we are talking about.

Have you made any AFR adjustments?

If you are using the stock fuel map on your 2008 fuel injected FLHX and no other modifications have been done to your motor, then you may need to have your bike looked at by a qualified technician.

Do you have the system number for the Kerker Stout mufflers you have purchased? I would need the system number from your purchase receipt.
Not the number on the muffler body.