wat is the db for a slip on hmf for a z400

[ice man]

with and with/o the quiet core and do u have to re jet when useing the quiet core :confused:

[KEVIN/HMF]

You'll keep the same jet with and w/o the Q core. This September we will be coming out with our new QS1 Ecosport series which will have you at stock dB's @ idle and about 95db's @ half throttle while keeping over 80% of our sport series power. It might be the pipe for you. If interested call the office 1-866-HMF-PIPE and get on the list for updats as the R&D process moves forward.