Will the Apex'i Dunk-styled Staight-Thru design Muffler bolt on to the factory equipment or is welding required? Also what does the Apex'i AFC module do? What hp gains can I expect? Is there a better high-flow muffler out there for the Maxima? Thanks for answers.......

 

it'll require some welding. If it's designed for it, it will "bolt" on in place of the muffler like how the Stillen muffler or HKS muffler section only is.

 

nice picture

 

S-AFC allows adjustment of the fuel curve. Will gain a few HP, but it also has a use as a safety device on the track (aka allowing you to run richer to avoid blowing up! ).