That's all good, but the fatty is for a 2-stroke.

 

That means I can buy it for my scrambler if the DYNO PORT pipe and silencer never came out.

2000 SCRAMBLER 400 2X4

SCRAMDADDY400

 

I would try contacting Supertrapp or White Bros. They make an excellent stainless steel pipe and muffler kit. You can customize the sound and power with the discs that are supplied. I have a Aean pipe on my 99 Scrambler 500 but I dont like it,too loud and has a ugly finsh. The HPD pipe looks like a tractor muffler.