If they will fit into the stock can I would run it into the stock can. I dont think you will see much of a performance difference between the two but then again I never have used there pipes. I have always ran Jaws pipes.
Not any noticable performance change on a stock/even slightly modded motor. MOre mods/more air flow then you couold start to see a bit of difference. The other thing you can see is where it makes hp...stock vs aftermarket can the peak power can move 100, 200 or 300 rpms.
Well heres my set trail sled race logic cylinder porting case tunnel pporting the newer Vforce3 reeds D&D trail pipe looking for 8800 rpm got orange black primary spring red white secondary with a top secret helix what would you guys do stock or aftermarket