[Robb]

I know on my 450, the piping going to the HMF was quite a bit bigger then the factory piping as well, so like Truegrit said, you are gonna have to cut and mandrel bend the piping with 2 45 degreee bends in it. Sometimes easier said then done. But if you got the tools, go for it. I like to fabricate to, but im not taking on that challange, HMF is tried and true.

 

[Robb]

HMF has a new mid pipe too, and its BIG. But yes, it slips on, it has a reducer at that end.

 

[Robb]

Thats a good question but I would venture to guess that most of the performance comes from the muffler it self. But the bigger pipe muse be for a reason. My Suppertrapp I had on my 450 had a new mid pipe as well, but it was the same size as stock, but stainless steel, and that exhaust didnt give the performance the HMF did.

 

[Robb]

That seems to be the jet to run with an HMF, the 170.

 

[Robb]

That I dont know.