Whay is the best exhaust for modded mojave. It has PowRoll Stroker .040 over piston .380 lift cams and heavy duty valve springs
im also wondering what the new displacement is and what size jet i should use.

 

Supertrapp exhaust, nothing else available for the mo compares

your new displacement is 283cc

start with a 138 main jet. that is two sizes bigger than stock.
work from there to get it right. I know you see people on here running 145 and even larger jets, but i have never seen a mo that was not way rich with those sizes no matter what kind of mods it has.

 

I run a 150 and I am a little rich, but I am pretty close to sea level also. I have become pretty good at jetting thru trial and lots of error-so I know where my jetting is at. Altitude/weather both have a huge impact on jetting by themselves, let alone any engine mods you have done.

 

I've heard that the White Brothers S-Bend is really good!